Made updating video sender parameters in sequential manner in order to solve race condition when transaction id (which is generated during getParameters) can be reset at the end of videoSender setParameters and cause exception if another update was already in fly and before its check for transaction id presence.

modules/RTC/TraceablePeerConnection.js

@@ -422,6 +422,8 @@ export default function TraceablePeerConnection(
         }, 1000);
     }
 
+    this._lastVideoSenderUpdatePromise = Promise.resolve();
+
     logger.info(`Create new ${this}`);
 }
 
@@ -2571,6 +2573,27 @@ TraceablePeerConnection.prototype.setSenderVideoConstraints = function(frameHeig
     if (!localVideoTrack || localVideoTrack.isMuted()) {
         return Promise.resolve();
     }
+
+    // Updating video sender parameters as wrapped-up promise to have ability
+    // to chain promises sequentially later and avoid chrome problem with transaction id
+    // which is reset at the end of video sender setParameters method and can affect
+    // next on-fly update
+    const nextPromise = this._lastVideoSenderUpdatePromise
+        .finally(() => this._updateVideoSenderParameters(frameHeight, localVideoTrack));
+
+    this._lastVideoSenderUpdatePromise = nextPromise;
+
+    return nextPromise;
+};
+
+/**
+ * Configures the video stream with resolution / degradation / maximum bitrates
+ *
+ * @param {number} frameHeight - The max frame height to be imposed on the outgoing video stream.
+ * @param {JitsiLocalTrack} - The local track for which the sender constraints have to be applied.
+ * @returns {Promise} promise that will be resolved when the operation is successful and rejected otherwise.
+ */
+TraceablePeerConnection.prototype._updateVideoSenderParameters = function(frameHeight, localVideoTrack) {
     const videoSender = this.findSenderForTrack(localVideoTrack.getTrack());
 
     if (!videoSender) {