Screen Sharing issues on Microsoft Teams on VDI (Teams Optimization Enabled)

Hi,

- We have recently enabled Optimization on Microsoft Teams using Horizon View 8.1 (2012)

- The users are remotely logging in to the VMs with updated Horizon 8.1 clients (2012)

- Some users are frequently having issues with incoming and outgoing screen shares. If they try to share their screen, remote users will not be able to see the content. If another user shares his screen, this same user will not be able to see the shared content.

- The users that report this issue the most frequently are logging to a GPU-Enabled Desktop Pool (NVidia Grid K1).

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Step by step scenario where user A is having issues.
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Meeting attendees :
- User A
- User B
- User C
- User D

Step #1 : If User B shares his screen :
- User A does not see the shared content.
- User C sees the shared content.
- User D sees the shared content.

Step #2 : If User A shares his screen :
- User B does not see the shared content.
- User C does not see the shared content.
- User D does not see the shared content.

Step #3 : User A completely exits the Teams Application and opens it back.

Step #4 : If User B shares his screen :
- User A sees the shared content.
- User C sees the shared content.
- User D sees the shared content.

Step #5 : If User A shares his screen :
- User B sees the shared content.
- User C sees the shared content.
- User D sees the shared content.

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Various information
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- The Microsoft Teams version on VDI was updated from 1.4.00.4167 to 1.4.00.6862
- These users have guest accounts to other organisations.
- Once a user is faced with the issue, screen sharing functions will not work in any meeting until the user completely closes the Microsoft Teams App.
- Microsoft Teams cache is automatically deleted within their profiles during the weekends and the issue even occurs on their first login with a "clean cache".
- The IT Staff haved tried over 25 different connections to reproduce the issue, logging into the same environment, user rights and on the same pool but we have not been able to face this issue once.
- Everything was working fine before Teams Optimization (with RTAV), however, video quality wasn't acceptable.
- When users are having issues, the "about" banner still shows "VMware Optimized".

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Questions
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- Is anyone facing these issues with the optimized Microsoft Teams on a VMware VDI environment?
- Is anyone facing these issues with the optimized Microsoft Teams on a CITRIX environment?
- Is anyone running a 100% stable optimized Microsoft Teams environment on any VDI Environment?
- Is anyone facing a random "glitch" where the "camera" and "phone" buttons and blank and they cannot complete a call? Banner still shows "VMware Optimized" and user is able to "receive" calls.

Thanks everyone for sharing your experiences!