Users lose visibility of screens

Hello community.

I have a problem with the /display/view screen.
Two weeks ago a couple of users stopped seeing the connected screens and, a few days later, they saw them again. When they saw them again, another user who is associated with the same permission groups stopped seeing them.
In all this time, my user has always seen and sees the screens.
Note that, in theory, I am the only one with administration access.

I would greatly appreciate any clues.