diff --git a/scripts/sources.json b/scripts/sources.json
index c9f78e37c..0fcd7ac8f 100644
--- a/scripts/sources.json
+++ b/scripts/sources.json
@@ -188,6 +188,12 @@
     "mimetype": "application/x-mpegurl",
     "features": ["live", "low-latency"]
   },
+  {
+    "name": "Mux's LL-HLS test stream",
+    "uri": "https://stream.mux.com/v69RSHhFelSm4701snP22dYz2jICy4E4FUyk02rW4gxRM.m3u8",
+    "mimetype": "application/x-mpegurl",
+    "features": ["live", "low-latency"]
+  },
   {
     "name": "Axinom Multi DRM - DASH, 4k, HEVC, Playready, Widevine",
     "uri": "https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest.mpd",
diff --git a/src/segment-loader.js b/src/segment-loader.js
index 5d8e5c3ab..8c1a3f249 100644
--- a/src/segment-loader.js
+++ b/src/segment-loader.js
@@ -1146,6 +1146,11 @@ export default class SegmentLoader extends videojs.EventTarget {
       this.transmuxer_.postMessage({
         action: 'clearAllMp4Captions'
       });
+
+      // reset the cache in the transmuxer
+      this.transmuxer_.postMessage({
+        action: 'reset'
+      });
     }
   }