I've had sandboxed Google Play Services installed for years with no problem. Last night, I got a notification from GmsCompat about "Missing Permission: Google Play services tried to show a notification." Hitting Open Settings in that notification brings up a settings page saying "You haven't allowed notification from this app" and gives me a slider to turn on "All Google Play services notifications." Is this new in GOS 20250719 (or whatever Android version underlies it)? I assume I should turn that on. But, before I do, I thought I'd ask.