Guest option turned on bug

Distribution

Linux Mint 22.1 Cinnamon

Package version

Cinnamon 6.4.6

Graphics hardware in use

Radeon R7 (integrated)

Frequency

Quite often

Bug description

So,this bug happens to me quite often everytime i allow guest log ins on my computer (happens on both fresh install and a normal personalized OS),when i restart there is always a chance that,when i boot it up again,all i see is just lightdm with a black background (default color) and it is just the guest log in option (note:i have the "switch user" thing off),usually i get logged in automatically unless i manually log out,so it is just the guest log in and the ui for the text box bugs out and looks like it "scrolls" when it is not supposed to be,the top half is only shown (basically where the "guest" text is) so it is basically impossible to log in unless you exactly click on the log in button that you can just see barely (like some px's at most),and that bug will continue inevitably (every boot/restart) unless i go to recovery mode and edit the lightdm.conf.d and turn off guest accounts

Steps to reproduce

-open system settings
-click login window (authenticate if needed)
-go to users tab
-allow log in turn off (i believe this is by default but i am not sure)
-turn on hide user list
-turn on allow guest sessions
-exit and continue using the computer as normal (**note again:**THIS only have some chances of happening so like random,but mine is quite often)

Expected behavior

booting up,no auto log in,just the lightdm greeter,and the (unhelpful) panel above with a black background,all i can do is either log in to guest session (useless and also no admin powers),or get stuck in the login window when the UI box "scrolls" and bugs out unless i precisely click the few pixels raised log in button (but still useless because it is guest,so)

Additional information

i do not have a guarantee that i can reproduce this every time since this only happens at random intervals

Start by reproducing the random boot behavior using the listed Login Window settings on Linux Mint Cinnamon, then inspect the guest-session configuration in lightdm.conf.d and the greeter behavior. Compare affected boots with boots where the guest option is disabled. Done means guest-enabled restarts no longer leave an unusable or visually corrupted guest-only login screen.