I have seen a couple issues with iOS 13.2 devices recently, most of them related with Apple bugs in latest versions.
- could you elaborate more on the issue, I mean, It is just stuttering video and audio or is the client connection being broken?
- could you narrow down issue depending device type, like iPhone X, iPAD, etc.?
- are you using dynamic VLAN on the WLAN?
- could you share a support info file of one of the APs just after this is happening?