I don't have notification forwarding from other profiles enabled. I noticed that message notifications were showing up in the top bar of my main profile. Nothing shows in notification history it just displays the name of the app in the top bar and disappears. I checked the other profile and the appearance in main profile coincided with receiving messages on the app in question. Has anyone else experienced this? It's the first time I've noticed it. Couldn't find anything on the issue tracker, just an old reddit post describing the same behaviour.
Notifications leaking from separate profile
a month later
Here is a forum post by someone else who have also observed the same:
https://discuss.grapheneos.org/d/15834-notification-leaking-to-another-profile
I have also observed it on my device, just, since I am the only user of my device I haven't been concerned about it.