Issues with FSLogix Profiles

Hey guys

we have a AVD environment with Windows 11 23h2 Multiuser session host's in a pooled Hostpool configured. The users are connecting via ThinClients with IgelOS and the AVD Client to the AVD Desktop. We have hybrid joined session host's which worked just fine till the 12th of December. We discovered that from different locations where the users are connected the have some issues with the FSLogix Profiles. It seems that the client lost connection to the session host when using short path with udp. then the users are trying to reconnect and get a temporary profile.

There was no change currently. We were able to solve the issue with just create new session host with Hydra and remove the old ones. But the issue is getting back of course.

In the logs in Azure I see the error:

ShortpathTransportNetworkDrop

The session host lost connection to the client because of an unexpected network error in the Shortpath transport. Check your network quality and configurations, then try again.

Does anybody have similar issues or know what could cause that? I checked with our Network Team and they don't see any issues on their side.

Many thanks for any feedback

Best regards,
Marc