Notification "burnt in" until screen updates

I have this problem for some days now, it is very obvious when multiple notifications are generated at once, e.g. plugging in a removable drive with udiskie with no window open. Hence my test case: `for x in 1 2 3 4 5; do notify-send "test" "message $x"; done`.

https://user-images.githubusercontent.com/2803622/158804837-4b88b127-bdda-489a-9543-da793e0e292e.mp4

Any update to the screen area will "flush" the lingering notification, that includes switching to (from?) the window behind it. Thus the issue mainly appears when there is no window open on the monitor, e.g. on boot or with a multi monitor setup.

My platform is arch linux `5.16.14-arch1-1 #1 SMP PREEMPT Fri, 11 Mar 2022 17:40:36 +0000 x86_64 GNU/Linux`, mako 1.6-3, sway 1.7-2, wlroots 0.15.1-3.