VM shutdown and services

[Qubes]

Can someone help me diagnose a problem that i have that seems to be
Qubes specific.

I use profile-sync-daemon with my web browser to run the entire browser
profile in memory. However, when i reboot (or shutodwn -> startup) a VM
somewhere there appears to be a timing problem with when
profile-sync-daemon is stopped and the actual VM is stopped. Because,
after every reboot my browser profile is corrupted. However, if i stop
profile-sync-daemon manually before rebooting my VM, systemctl --user
stop psd, everything runs smooth.

I am sure it has to do with profile-sync-daemon not allowed enough time
to write the browser profile in memory out to disk before the reboot
happens.