RDS 2016 screen issue

Hello,

I don't know if this is the right place for my question because it's about server RDS 2016.

We have a RDS 2016 evironment en randomly some client have strange screen issue's, distorted screen in their RDS session. People with the problems are switching often between application and it looks like screen caching problem. When disconnecting the session and reconnect the problem is solved. See screenshot attached.

What have we done:

* Disabled persistent cache under advanced RDP settings clients.

* Disabled other settings under advanced RDP settings clients

* There is nog difference between connecting with thin client or fat client