Hi there @amuramira,
We have seen this happen sporadically with some users. The problem has been that the users accumulate some sort of corruption in their dashboard configs.
To rectify it you will need to delete the dashboard config for the affected users, or potentially for all users. This is done by logging in with an administrator account and opening the “Datastore management” app. Here, you must navigate to the layout key under “Tracker”. If the problem in your instance is so big that it is not feasible to fix the users one by one, then you might need to do a cleanup in the database.
We have not been able to single out what behavior causes it to happen, and are very interested if you are able to reproduce the problem after fixing it by deleting the corrupted layout.