Perspective Sessions being logged out on single clients

Hi,

I rolled out an Perspective project and now am getting the feedback that on single clients the sessions are being closed and the user is asked to authenticate again. AD is used. At other computer the sessions are just running fine for days.

There are specific clients who are affected by that but I currently have no clue how to track or find a root cause for it. Any hint how to find something?

Different firewalls along various paths? Some older firewalls are known to kill websockets after a certain duration.