vGPU A16 / Citrix Multi-Session OS DWM.exe crashes after about 13-14 Users are logged in

Hello!

First of, here are the specs of the environment:

Citrix Virtual Apps and Desktops LTSR 2203 CU5 running on

Hypervisor: VMWare Esxi 7.03, 23794027

Provisioned (non Persistent)
VM OS: Server 2022
6 vCPUs
64 GB RAM
vGPU NVIDIA A16 - 16a Profile

The Users only open Desktops on the VDI Servers using Applikations such as Teams, Office 365 and Browsers, no CAD or similar.

We experience the Problem that after a certain threshold of users (12-13 Users), no new logons are possible with the server eventualy getting a bluescreen.

The Eventlog shows the Following:

The Desktop Window Manager process has exited. (Process exit code: 0xe0464645, Restart count: 1, Primary display device ID: )

The Desktop Window Manager process has exited. (Process exit code: 0xe0464645, Restart count: 2, Primary display device ID: Citrix Indirect Display Adapter)

and so on till the bluescreen occurs.

Our Partner Said there should not be a Problem to have at least 15-20 concurrent Sessions on one VM with our Configuration.

Does anyone Know this issue or can help me with this? That would be Great!

Thanks in Advance!