Hi - I can send the diagnostic - but first I would like to clarify the issue.
I have created several users (in fact, my wife, two daughters, one son etc., each with her/his account).
Sometimes, one of the users forgets to logoff and maybe goes out of home. The screen gets locked automatically.
If another person wants to use this computer, the only way that I found is to turn it off.
But in Windows and in Linux it is possible to change (switch) the user, making login with a different user without forcing shutdown. The inactive user is in some way frozen, not logged out, and will not lose any unsaved files.
Because this is a feature available in Linux, it should be available also in Endless, I suppose. But I cannot see how.