General observation that is more a ‘feeling’.
I find chromium re-opens without restoring my tabs a lot more often than it used to since it switched to snap. Right now it refuses to restore so I’m re-creating my default tabs again…
To test a lubuntu-grub-theme I just closed chromium on my 19.10 box (~10 mins back), then logged out/rebooted; after reboot (viewing grub as displayed) I log back in and my chromium wouldn’t restore my settings…
I suspect I need to wait far longer than I do (which was no time) between closing chromium and the logout/reboot steps; I don’t know if this is true or not, but it seems to occur only on fast reboots (such as reboot just to test something minutes ago) thus I wonder if snap is slowed to shutdown cleanly compared to long ago when chromium wasn’t snap).
I can’t prove any of this, but snap list shows (edited)
chromium 76.0.3809.87 817 stable canonical✓ -
core 16-2.39.3 7270 stable canonical✓ core
I was logged in with XFCE & rebooted to XFCE