Ignore engine closed events for data track packets which are in flight / un delivered on engine close

.changeset/beige-cases-show.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Ignore engine closed events for data track packets which are in flight / un delivered on engine close

src/room/RTCEngine.ts

@@ -1519,7 +1519,17 @@ export default class RTCEngine extends (EventEmitter as new () => TypedEventEmit
         // buffer status to not be low before continuing.
         switch (bufferStatusLowBehavior) {
           case 'wait':
-            await this.waitForBufferStatusLow(kind);
+            try {
+              await this.waitForBufferStatusLow(kind);
+            } catch (err) {
+              // Swallow engine closed errors - if there are lossy packets waiting for the buffer
+              // status to go low and the engine closes, these packets should just be silently
+              // dropped.
+              if (err instanceof UnexpectedConnectionState && err.message === 'engine closed') {
+                return;
+              }
+              throw err;
+            }
             break;
           case 'drop':
             // this.log.warn(`dropping lossy data channel message`, this.logContext);