Ensure that if the signal layer is disconnected, signalling messages aren't sent in another place (#1601)

Author: 1egoman

.changeset/rare-nails-share.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+skip errant signal layer leave message when already disconnected

src/api/SignalClient.ts

@@ -669,6 +669,12 @@ export class SignalClient {
     if (this.signalLatency) {
       await sleep(this.signalLatency);
     }
+    if (this.isDisconnected) {
+      // Skip requests if the signal layer is disconnected
+      // This can happen if an event is sent in the mist of room.connect() initializing
+      this.log.debug(`skipping signal request (type: ${message.case}) - SignalClient disconnected`);
+      return;
+    }
     if (!this.ws || this.ws.readyState !== this.ws.OPEN) {
       this.log.error(
         `cannot send signal request before connected, type: ${message?.case}`,