In our large school, we always use peer-to-peer Airplay to mirror the screen of iPads to an Apple TV. The iPads and Apple TV's are on the same SSID, but all in different VLAN's. The P2P discovery over bluetooth works perfect and the screen mirroring has always been good ... untill recently. Airplay mirroring to Apple TV's of the 3rd generation has become much worse (stuttering video and audio) since the last couple of weeks. In that periode, we did two changes: the clients were updated to iOS/iPadOS 13.2.x and the Zonedirector and AP's were updated from 10.0.2.x to 10.3.1.0. We don't know if those software updates caused peer-to-peer Airplay to be much worse. On the Apple TV's of the 4th generation, peer-to-peer Airplay is smooth like it was before.
If anyone has the same experience or knows if this has something to do with a bug in iOS 13 or a setting in the latest ZD firmware, any advice would be greatly appreciated.