occasionally my pc with elementary os 5.1 (based on Ubuntu 18.04) makes automatic logout session. This problem comes up, after minutes, when I change virtual desktop (ex. clicking on telegram notify that it's in 3rd desktop). No system error messages appear, simply operating system goes to login screen, closing all my work.
Everything has been updated, video driver and operating system.
I don't know what I have to see for resolving this problem. Thanks in advance.