Lock screen not displaying correctly on dual monitor setup with scaling.

[rmysliwczyk]

Distribution

Mint 22.1

Package version

6.4.7

Graphics hardware in use

AMD Radeon Rx 470

Frequency

Always

Bug description

Lock screen doesn't display properly (black screen with graphical glitches) when my main display (landscape) is set to 125% scaling, with my secondary (vertical) display is set to 100% scaling.

Steps to reproduce

Have main display scaling set to 125% and secondary display to 100%. Click on Lock screen button in the menu.
Here's a link to video showing my issue: Lock screen bug

Expected behavior

Lock screen displaying properly.

Additional information

The bug doesn't seem to appear when I set scaling to 150% on my main display and 100% on my secondary display. Also, occasionally when I unlock my screen (no matter if with 125% or 150% scaling) my wallpaper is zoomed in, but I've made a comment about this in linuxmint/cinnamon#12009. My main display is Samsung 29" 3840x2160 (16:9) in landscape. My secondary monitor is NEC 22" 1680x1050 (16:10) in vertical mode.

systeminfo.txt