Notifications with a timer to fade out gets stuck on their last millisecond when locking the session, when the session is unlocked after the timer expired, the notification can be seen fading out.
Can reproduce. It may be intentional, but I'll agree with the implication that it looks buggy.
I've discovered that the notifications will also get stuck in their last frame if you had already locked when you receive them.
Created attachment 181866 [details] Email notifications also get broken even if they're sent while the session is locked.