Is my Linux on LSD, or why does it take weird screenshots?

Question

Debian

worth debian + gnome
When you press the "Print Screen" key, screenshots are saved to the "Pictures" folder.
but they look kinda weird.

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and each time they look different. Here is an example of two desktop screenshots:

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Answer 1

This is a gnome bug.
It surfaced at the beginning of 2017 on the ubuntu tracker ( https://bugs.launchpad.net/ubuntu/+source/gnome-sc... but it was present in many distributions (arch/centos for sure).
I didn’t understand what it was about related, and even now I don’t really understand who was helped by updating the video driver, and for someone by reinstalling the system and a miracle happened.Many had
a problem on the integrated graphics from Intel, but there were complaints about Nvidia.Without a piece of
iron on hand, it’s hard to say something and diagnose.
Start from LiveCD and try the print screen there, if something works or something got crooked or crookedly updated but the source is Gnome and the video driver.