Typing on windows behind lockscreen

[mrmelon54]

Distribution

Linux Mint 21.2 Cinnamon

Package version

5.8.4

Graphics hardware in use

NVIDIA GeForce RTX 3070 TI

Frequency

Only occasionally

Bug description

Sometimes when locking my pc and coming back to it hours later, typing my password will type on a window which is supposedly protected by the lockscreen. This is particularly scary if I have Discord focussed when locking.

Sometimes the actual windows I have open will flash before the lockscreen shows when pressing a key while the screen is off.

Steps to reproduce

Lock the pc, wait for screen to go off and start typing password from screen off.

Expected behavior

Password types in password box on the lock screen.

Additional information

I have no idea, I only know that I managed to type part of my password on my Discord window while my pc was supposedly locked.