I'm looking for a few pointers on where I can begin tracking down some anomalous behavior.
Occasionally (non-deterministically, but often enough to be inconvenient), I'll resume a session after suspending and all previously open applications have been closed.
This appears to have been an issue before with different versions:
https://ubuntuforums.org/showthread.php?t=2246309 [Solution no long applies as light-locker isn't installed]
Resume from Suspend closes applications [ACPI based solution, non-deterministic behavior makes me suspicious as to whether this will work]
I'd like to reiterate that this doesn't always happen, and I haven't noticed any causal links (although I have a hunch that it may only happen if a lot of applications are open - perhaps the issue is memory related?).
I have noticed this in syslog though - I don't think it is related however, as this appears with every sleep:
systemd-sleep: Failed to connect to non-global ctrl_ifname: (nil) error: No such file or directory systemd-sleep: /lib/systemd/system-sleep/wpasupplicant failed with error code 255.