Some notifications like to persist forever. Don’t know why?
Here is my system setting
This doesn’t seem to be a KDE notification popup, this is modified.
Also you could maybe configure notification for the specific application?
Maybe the notification is set as a critical one, and regarding your settings it just stays up as intended?
Does this Always On Top
means Forever On Top
! I thought Always on Top
mean Foreground of all Active Window
!
I don’t know, by default all notifications are in the foreground so… maybe try?