Please try it with this setting in WCS-HOME/conf/flashphoner.properties:
Restart WCS to apply the setting.
Also, try using RTP over RTSP (TCP) - interleaved mode in the player used for playing the RTSP stream.
If that doesn't have effect, please clarify the scenario:
- a stream is published to WCS: what is the source - WebRTC or RTMP, and what OS, browser (or application) is used for streaming?
- the stream is played as RTSP (rtsp://WCS:554/stream): what player is used?
- the RTSP stream has choppy or disappearing audio
and prepare the report containing network traffic dump and WCS client debug log (here
described how) and send it to firstname.lastname@example.org