Bugs can be reported here.
When submitting a bug report, please attach a copy of the system log of OpenVPN server:
$ journalctl --no-pager -u snap.easy-openvpn.easy-openvpn
And the output of the following three commands:
$ easy-openvpn.connect-server foo.ovpn
$ easy-openvpn.status
$ easy-openvpn.clients