Do you know the reason causing such a fallback? Would there, in general, be any other possibility to use UDP under the circumstances causing the fallback?
If I am not mistaken, it is at least possible to detect whether UDP is available using the protocol property of the RTCIceCandidate. [1]
If I am not mistaken, it is at least possible to detect whether UDP is available using the protocol property of the RTCIceCandidate. [1]
[1] https://www.w3.org/TR/webrtc/#dom-rtcicecandidate