Fix av desync by forcing audio demuxing to wait for main initPTS

src/controller/audio-stream-controller.js

@@ -523,7 +523,7 @@ class AudioStreamController extends BaseStreamController {
         // If not we need to wait for it
         let initPTS = this.initPTS[cc];
         let initSegmentData = details.initSegment ? details.initSegment.data : [];
-        if (details.initSegment || initPTS !== undefined) {
+        if (initPTS !== undefined) {
           this.pendingBuffering = true;
           logger.log(`Demuxing ${sn} of [${details.startSN} ,${details.endSN}],track ${trackId}`);
           // time Offset is accurate if level PTS is known, or if playlist is not sliding (not live)