diff --git a/lib/player.js b/lib/player.js
index b22b502372..7e4892caa1 100644
--- a/lib/player.js
+++ b/lib/player.js
@@ -2217,6 +2217,14 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
 
     this.playhead_ = new shaka.media.SrcEqualsPlayhead(has.mediaElement);
 
+    // This flag is used below in the language preference setup and
+    // track-management to check if this load was canceled before the necessary
+    // events fired.
+    let unloaded = false;
+    this.cleanupOnUnload_.push(() => {
+      unloaded = true;
+    });
+
     if (has.startTime != null) {
       this.playhead_.setStartTime(has.startTime);
     }
@@ -2268,6 +2276,12 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
     }
     if (this.video_.textTracks) {
       this.eventManager_.listen(this.video_.textTracks, 'addtrack', (e) => {
+        // If we have moved on to another piece of content while waiting for
+        // the above event, we should not process tracks here.
+        if (unloaded) {
+          return;
+        }
+
         const trackEvent = /** @type {!TrackEvent} */(e);
         if (trackEvent.track) {
           const track = trackEvent.track;
@@ -2327,13 +2341,6 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
           fullyLoaded.resolve();
         });
 
-    // This flag is used below in the language preference setup to check if this
-    // load was canceled before the necessary events fire.
-    let unloaded = false;
-    this.cleanupOnUnload_.push(() => {
-      unloaded = true;
-    });
-
     // We can't switch to preferred languages, though, until the data is loaded.
     shaka.util.MediaReadyState.waitForReadyState(this.video_,
         HTMLMediaElement.HAVE_CURRENT_DATA,
@@ -2488,12 +2495,16 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
     // In Safari the initial assignment does not always work, so we schedule
     // this process to be repeated several times to ensure that it has been put
     // in the correct mode.
-    new shaka.util.Timer(() => {
+    const timer = new shaka.util.Timer(() => {
       const textTracks = this.getMetadataTracks_();
       for (const textTrack of textTracks) {
         textTrack.mode = 'hidden';
       }
-    }).tickNow().tickAfter(/* seconds= */ 0.5);
+    }).tickNow().tickAfter(0.5);
+
+    this.cleanupOnUnload_.push(() => {
+      timer.stop();
+    });
   }
 
 
@@ -2561,12 +2572,16 @@ shaka.Player = class extends shaka.util.FakeEventTarget {
     // In Safari the initial assignment does not always work, so we schedule
     // this process to be repeated several times to ensure that it has been put
     // in the correct mode.
-    new shaka.util.Timer(() => {
+    const timer = new shaka.util.Timer(() => {
       const chaptersTracks = this.getChaptersTracks_();
       for (const chaptersTrack of chaptersTracks) {
         chaptersTrack.mode = 'hidden';
       }
-    }).tickNow().tickAfter(/* seconds= */ 0.5);
+    }).tickNow().tickAfter(0.5);
+
+    this.cleanupOnUnload_.push(() => {
+      timer.stop();
+    });
   }
 
   /**