Very Frequent "unauthorized access" in UI - all of a sudden

All of a sudden, I get “unauthorized access” msg, after having logged in to the UI.
Usually 15-20 seconds after the successful login, these and other msgs start to appear and eventually (after a minute or so) my session will be disconnected with the msg “Your session has timed out. Log in again to continue”.
It suddenly started to behave that way… :frowning:

Any idea, hint, suggestion?

Hello @eili,
Is this in cloud or oss?
Thank you

In the meantime I applied the procedure " Rebuild the TSI index" and after some reboots the situation has improved.
UI timeouts occur now significantly less often.