Freezing screen sharing sessions in MS Teams

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Hey,

Has anyone experiences in troubleshooting Teams sessions?

We're facing an issue during screen sharing in MS Teams in one of our locations.

When more than two attendees from different locations joining a Teams session (no peer-to-peer session, traffic runs through M365 network), and one of them shares the screen, some of the attendees in only one location complaining that the screen sharing stream freeze for up to 10 minutes on their clients. All other attendees in other locations are fine. If the affected clients work from a different location they're also fine. Audio and video is always fine, even if the screen sharing stream freeze.

My conclusion so far:

• Not an client issue, otherwise they should be affected by this issue in other locations as well.
• Not an issue of the screen sharing source, otherwise all attendees should have the issue at the same time.
• Video and audio are fine, so no bandwidth issue.

I've captured the traffic of one client during a meeting when the screen sharing stream freezed up. I can see that the screen sharing stream bandwidth drops down when the issue occures. But there's still traffic.

I/O Graph

I will prepare the capture for sharing tomorrow. Any suggestions?

Thanks Jas Man