Hi, this week, I found that some instance start without error but stop soon. But I can not found any cause from debug log, can anyone give some idea, thank you 
LXD version：5.16-f2b0200
time="2023-07-28T12:41:16Z" level=debug msg="Handling API request" ip=@ method=GET protocol=unix url=/1.0/events username=xiyou
time="2023-07-28T12:41:16Z" level=debug msg="Event listener server handler started" id=410e3f87-498a-4e24-950f-7eeee3d72402 local=/var/snap/lxd/common/lxd/unix.socket remote=@
time="2023-07-28T12:41:16Z" level=debug msg="Handling API request" ip=@ method=PUT protocol=unix url=/1.0/instances/shpc-2291-instance-HiQDflgE/state username=xiyou
time="2023-07-28T12:41:16Z" level=debug msg="API Request\n\t{\n\t\t\"action\": \"start\",\n\t\t\"timeout\": 0,\n\t\t\"force\": false,\n\t\t\"stateful\": false\n\t}" ip=@ method=PUT protocol=unix url=/1.0/instances/shpc-2291-instance-HiQDflgE/state username=xiyou
time="2023-07-28T12:41:16Z" level=debug msg="New operation" class=task description="Starting instance" operation=cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc project=default
time="2023-07-28T12:41:16Z" level=debug msg="Started operation" class=task description="Starting instance" operation=cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc project=default
time="2023-07-28T12:41:16Z" level=debug msg="WriteJSON\n\t{\n\t\t\"type\": \"async\",\n\t\t\"status\": \"Operation created\",\n\t\t\"status_code\": 100,\n\t\t\"operation\": \"/1.0/operations/cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc\",\n\t\t\"error_code\": 0,\n\t\t\"error\": \"\",\n\t\t\"metadata\": {\n\t\t\t\"id\": \"cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc\",\n\t\t\t\"class\": \"task\",\n\t\t\t\"description\": \"Starting instance\",\n\t\t\t\"created_at\": \"2023-07-28T12:41:16.539288364Z\",\n\t\t\t\"updated_at\": \"2023-07-28T12:41:16.539288364Z\",\n\t\t\t\"status\": \"Running\",\n\t\t\t\"status_code\": 103,\n\t\t\t\"resources\": {\n\t\t\t\t\"instances\": [\n\t\t\t\t\t\"/1.0/instances/shpc-2291-instance-HiQDflgE\"\n\t\t\t\t]\n\t\t\t},\n\t\t\t\"metadata\": null,\n\t\t\t\"may_cancel\": false,\n\t\t\t\"err\": \"\",\n\t\t\t\"location\": \"lxd8\"\n\t\t}\n\t}" http_code=202
time="2023-07-28T12:41:16Z" level=debug msg="Start started" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default stateful=false
time="2023-07-28T12:41:16Z" level=debug msg="Instance operation lock created" action=start instance=shpc-2291-instance-HiQDflgE project=default reusable=false
time="2023-07-28T12:41:16Z" level=info msg="Starting instance" action=start created="2023-04-21 00:50:36.467426965 +0000 UTC" ephemeral=false instance=shpc-2291-instance-HiQDflgE instanceType=container project=default stateful=false used="2023-07-28 12:39:59.495276907 +0000 UTC"
time="2023-07-28T12:41:16Z" level=debug msg="Handling API request" ip=@ method=GET protocol=unix url=/1.0/operations/cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc username=xiyou
time="2023-07-28T12:41:16Z" level=debug msg="WriteJSON\n\t{\n\t\t\"type\": \"sync\",\n\t\t\"status\": \"Success\",\n\t\t\"status_code\": 200,\n\t\t\"operation\": \"\",\n\t\t\"error_code\": 0,\n\t\t\"error\": \"\",\n\t\t\"metadata\": {\n\t\t\t\"id\": \"cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc\",\n\t\t\t\"class\": \"task\",\n\t\t\t\"description\": \"Starting instance\",\n\t\t\t\"created_at\": \"2023-07-28T12:41:16.539288364Z\",\n\t\t\t\"updated_at\": \"2023-07-28T12:41:16.539288364Z\",\n\t\t\t\"status\": \"Running\",\n\t\t\t\"status_code\": 103,\n\t\t\t\"resources\": {\n\t\t\t\t\"instances\": [\n\t\t\t\t\t\"/1.0/instances/shpc-2291-instance-HiQDflgE\"\n\t\t\t\t]\n\t\t\t},\n\t\t\t\"metadata\": null,\n\t\t\t\"may_cancel\": false,\n\t\t\t\"err\": \"\",\n\t\t\t\"location\": \"lxd8\"\n\t\t}\n\t}" http_code=200
time="2023-07-28T12:41:16Z" level=debug msg="MountInstance started" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:16Z" level=debug msg="Activated RBD volume" dev=/dev/rbd8 driver=ceph pool=remote volName=container_shpc-2291-instance-HiQDflgE
time="2023-07-28T12:41:16Z" level=debug msg="Mounted RBD volume" dev=/dev/rbd8 driver=ceph options=discard path=/var/snap/lxd/common/lxd/storage-pools/remote/containers/shpc-2291-instance-HiQDflgE pool=remote volName=shpc-2291-instance-HiQDflgE
time="2023-07-28T12:41:16Z" level=debug msg="MountInstance finished" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:17Z" level=debug msg="Starting device" device=eth0 instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=nic
time="2023-07-28T12:41:17Z" level=debug msg="Starting device" device=root instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=disk
time="2023-07-28T12:41:17Z" level=debug msg="Starting device" device=home instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=disk
time="2023-07-28T12:41:17Z" level=debug msg="MountCustomVolume started" driver=ceph pool=remote project=default volName=custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:17Z" level=debug msg="Activated RBD volume" dev=/dev/rbd9 driver=ceph pool=remote volName=custom_default_custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:17Z" level=debug msg="Mounted RBD volume" dev=/dev/rbd9 driver=ceph options=discard path=/var/snap/lxd/common/lxd/storage-pools/remote/custom/default_custom-volume-of-2291-431-MiwzE14g pool=remote volName=default_custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:17Z" level=debug msg="MountCustomVolume finished" driver=ceph pool=remote project=default volName=custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:17Z" level=debug msg="UpdateInstanceBackupFile started" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:17Z" level=debug msg="Skipping unmount as in use" driver=ceph pool=remote refCount=1 volName=shpc-2291-instance-HiQDflgE
time="2023-07-28T12:41:17Z" level=debug msg="UpdateInstanceBackupFile finished" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:17Z" level=debug msg="Handling API request" ip=@ method=GET protocol=unix url="/internal/containers/shpc-2291-instance-HiQDflgE/onstart?project=default" username=root
time="2023-07-28T12:41:18Z" level=debug msg="Scheduler: container shpc-2291-instance-HiQDflgE started: re-balancing"
time="2023-07-28T12:41:18Z" level=debug msg="WriteJSON\n\t{\n\t\t\"type\": \"sync\",\n\t\t\"status\": \"Success\",\n\t\t\"status_code\": 200,\n\t\t\"operation\": \"\",\n\t\t\"error_code\": 0,\n\t\t\"error\": \"\",\n\t\t\"metadata\": {}\n\t}" http_code=200
time="2023-07-28T12:41:18Z" level=info msg="Started instance" action=start created="2023-04-21 00:50:36.467426965 +0000 UTC" ephemeral=false instance=shpc-2291-instance-HiQDflgE instanceType=container project=default stateful=false used="2023-07-28 12:39:59.495276907 +0000 UTC"
time="2023-07-28T12:41:18Z" level=debug msg="Instance operation lock finished" action=start err="<nil>" instance=shpc-2291-instance-HiQDflgE project=default reusable=false
time="2023-07-28T12:41:18Z" level=debug msg="Start finished" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default stateful=false
time="2023-07-28T12:41:18Z" level=debug msg="Success for operation" class=task description="Starting instance" operation=cecabdbe-43a4-4bb0-8b1c-c4a41a4527bc project=default
time="2023-07-28T12:41:18Z" level=debug msg="Event listener server handler stopped" listener=410e3f87-498a-4e24-950f-7eeee3d72402 local=/var/snap/lxd/common/lxd/unix.socket remote=@
time="2023-07-28T12:41:19Z" level=debug msg="Handling API request" ip=@ method=GET protocol=unix url="/internal/containers/shpc-2291-instance-HiQDflgE/onstopns?netns=%2Fproc%2F1074792%2Ffd%2F4&project=default&target=stop" username=root
time="2023-07-28T12:41:19Z" level=debug msg="Instance initiated stop" action=stop instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:19Z" level=debug msg="Instance operation lock created" action=stop instance=shpc-2291-instance-HiQDflgE project=default reusable=false
time="2023-07-28T12:41:19Z" level=debug msg="Stopping device" device=eth0 instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=nic
time="2023-07-28T12:41:19Z" level=debug msg="Clearing instance firewall static filters" IPv4Nets="[172.16.11.135/32]" IPv6Nets="[]" device=eth0 driver=nic host_name=vethfc8d5477 hwaddr="00:16:3e:da:d4:5b" instance=shpc-2291-instance-HiQDflgE parent=bridge0 project=default
time="2023-07-28T12:41:19Z" level=debug msg="Clearing instance total protocol filters" IPv4Nets="[172.16.11.135/32]" IPv6Nets="[]" device=eth0 driver=nic host_name=vethfc8d5477 hwaddr="00:16:3e:da:d4:5b" instance=shpc-2291-instance-HiQDflgE parent=bridge0 project=default
time="2023-07-28T12:41:19Z" level=debug msg="WriteJSON\n\t{\n\t\t\"type\": \"sync\",\n\t\t\"status\": \"Success\",\n\t\t\"status_code\": 200,\n\t\t\"operation\": \"\",\n\t\t\"error_code\": 0,\n\t\t\"error\": \"\",\n\t\t\"metadata\": {}\n\t}" http_code=200
time="2023-07-28T12:41:19Z" level=debug msg="Matched trusted cert" fingerprint=e9047f5581d5445d740979ef5ff2d7f87a37a1a8bbccdf93f89ea3872534c298 subject="CN=root@lxd3,O=linuxcontainers.org"
time="2023-07-28T12:41:19Z" level=debug msg="Replace current raft nodes" raftMembers="[{{11 172.16.4.9:8443 spare} lxd9} {{18 172.16.4.13:8443 spare} lxd13} {{4 172.16.0.20:8443 voter} client} {{10 172.16.4.8:8443 spare} lxd8} {{12 172.16.4.4:8443 spare} lxd4} {{14 172.16.4.11:8443 spare} lxd11} {{15 172.16.4.12:8443 spare} lxd12} {{13 172.16.4.10:8443 spare} lxd10} {{16 172.16.4.14:8443 spare} lxd14} {{2 172.16.4.2:8443 spare} lxd2} {{7 172.16.4.5:8443 voter} lxd5} {{9 172.16.4.7:8443 stand-by} lxd7} {{1 172.16.4.1:8443 spare} lxd1} {{17 172.16.4.15:8443 spare} lxd15} {{3 172.16.4.3:8443 voter} lxd3} {{8 172.16.4.6:8443 stand-by} lxd6}]"
time="2023-07-28T12:41:19Z" level=debug msg="Handling API request" ip=@ method=GET protocol=unix url="/internal/containers/shpc-2291-instance-HiQDflgE/onstop?project=default&target=stop" username=root
time="2023-07-28T12:41:19Z" level=debug msg="Instance operation lock inherited for stop" action=stop instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:19Z" level=debug msg="WriteJSON\n\t{\n\t\t\"type\": \"sync\",\n\t\t\"status\": \"Success\",\n\t\t\"status_code\": 200,\n\t\t\"operation\": \"\",\n\t\t\"error_code\": 0,\n\t\t\"error\": \"\",\n\t\t\"metadata\": {}\n\t}" http_code=200
time="2023-07-28T12:41:19Z" level=debug msg="Instance stopped, cleaning up" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:20Z" level=debug msg="Stopping device" device=home instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=disk
time="2023-07-28T12:41:20Z" level=debug msg="UnmountCustomVolume started" driver=ceph pool=remote project=default volName=custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:20Z" level=debug msg="Unmounted RBD volume" driver=ceph keepBlockDev=false path=/var/snap/lxd/common/lxd/storage-pools/remote/custom/default_custom-volume-of-2291-431-MiwzE14g pool=remote volName=default_custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:21Z" level=debug msg="Deactivated RBD volume" driver=ceph pool=remote volName=custom_default_custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:21Z" level=debug msg="UnmountCustomVolume finished" driver=ceph pool=remote project=default volName=custom-volume-of-2291-431-MiwzE14g
time="2023-07-28T12:41:21Z" level=debug msg="Stopping device" device=root instance=shpc-2291-instance-HiQDflgE instanceType=container project=default type=disk
time="2023-07-28T12:41:21Z" level=debug msg="UnmountInstance started" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:21Z" level=debug msg="Unmounted RBD volume" driver=ceph keepBlockDev=false path=/var/snap/lxd/common/lxd/storage-pools/remote/containers/shpc-2291-instance-HiQDflgE pool=remote volName=shpc-2291-instance-HiQDflgE
time="2023-07-28T12:41:21Z" level=debug msg="Matched trusted cert" fingerprint=d44c9c3b94c28b9489a737f326ea44009be8b7fa6f3ec7579e76d04252d43e3a subject="CN=metrics.local"
time="2023-07-28T12:41:21Z" level=debug msg="Handling API request" ip="172.16.0.21:41750" method=GET protocol=tls url=/1.0/metrics username=d44c9c3b94c28b9489a737f326ea44009be8b7fa6f3ec7579e76d04252d43e3a
time="2023-07-28T12:41:21Z" level=warning msg="Failed to get memory usage" err="Failed parsing \"\": strconv.ParseInt: parsing \"\": invalid syntax" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:21Z" level=warning msg="Failed to get oom kills" err="Failed getting oom_kill" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:21Z" level=warning msg="Failed to get swap usage" err="Failed parsing \"\": strconv.ParseInt: parsing \"\": invalid syntax" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:21Z" level=warning msg="Failed to get CPUs" err="Failed parsing \"\": strconv.Atoi: parsing \"\": invalid syntax" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:21Z" level=warning msg="Failed to get total number of processes" err="PID of LXC instance could not be initialized" instance=shpc-2291-instance-HiQDflgE instanceType=container project=default
time="2023-07-28T12:41:21Z" level=debug msg="Deactivated RBD volume" driver=ceph pool=remote volName=container_shpc-2291-instance-HiQDflgE
time="2023-07-28T12:41:21Z" level=debug msg="UnmountInstance finished" driver=ceph instance=shpc-2291-instance-HiQDflgE pool=remote project=default
time="2023-07-28T12:41:22Z" level=info msg="Shut down instance" action=stop created="2023-04-21 00:50:36.467426965 +0000 UTC" ephemeral=false instance=shpc-2291-instance-HiQDflgE instanceType=container project=default stateful=false used="2023-07-28 12:41:18.260754049 +0000 UTC"
time="2023-07-28T12:41:22Z" level=debug msg="Instance operation lock finished" action=stop err="<nil>" instance=shpc-2291-instance-HiQDflgE project=default reusable=false
time="2023-07-28T12:41:22Z" level=debug msg="Scheduler: container shpc-2291-instance-HiQDflgE stopped: re-balancing"
time="2023-07-28T12:41:31Z" level=debug msg="Matched trusted cert" fingerprint=e9047f5581d5445d740979ef5ff2d7f87a37a1a8bbccdf93f89ea3872534c298 subject="CN=root@lxd3,O=linuxcontainers.org"
time="2023-07-28T12:41:31Z" level=debug msg="Replace current raft nodes" raftMembers="[{{4 172.16.0.20:8443 voter} client} {{7 172.16.4.5:8443 voter} lxd5} {{13 172.16.4.10:8443 spare} lxd10} {{15 172.16.4.12:8443 spare} lxd12} {{8 172.16.4.6:8443 stand-by} lxd6} {{10 172.16.4.8:8443 spare} lxd8} {{11 172.16.4.9:8443 spare} lxd9} {{14 172.16.4.11:8443 spare} lxd11} {{17 172.16.4.15:8443 spare} lxd15} {{18 172.16.4.13:8443 spare} lxd13} {{2 172.16.4.2:8443 spare} lxd2} {{9 172.16.4.7:8443 stand-by} lxd7} {{1 172.16.4.1:8443 spare} lxd1} {{12 172.16.4.4:8443 spare} lxd4} {{16 172.16.4.14:8443 spare} lxd14} {{3 172.16.4.3:8443 voter} lxd3}]"