WebRTC Connection Drops at 500 Concurrent Users in JMeter

Just noticed that WebSocket connections drop with code 1006 when pushing 500 concurrent threads through the softphone API. Environment is Genesys Cloud US1, JMeter 5.6, and we are using the latest WebRTC client SDK.

“The platform supports up to 1000 concurrent WebRTC sessions per tenant.”

The logs show successful handshake but immediate disconnection on data channel open. Is this a hidden rate limit on the signaling server?