diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
index c1eff4e84..7f0326019 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/AudioPlayerFragment.java
@@ -102,7 +102,7 @@ public class AudioPlayerFragment extends Fragment implements
         toolbar.setOnMenuItemClickListener(this);
 
         ExternalPlayerFragment externalPlayerFragment = new ExternalPlayerFragment();
-        getFragmentManager().beginTransaction()
+        getChildFragmentManager().beginTransaction()
                 .replace(R.id.playerFragment, externalPlayerFragment, ExternalPlayerFragment.TAG)
                 .commit();
 
@@ -127,7 +127,7 @@ public class AudioPlayerFragment extends Fragment implements
         sbPosition.setOnSeekBarChangeListener(this);
 
         pager = root.findViewById(R.id.pager);
-        AudioPlayerPagerAdapter pagerAdapter = new AudioPlayerPagerAdapter(getFragmentManager());
+        AudioPlayerPagerAdapter pagerAdapter = new AudioPlayerPagerAdapter(getChildFragmentManager());
         pager.setAdapter(pagerAdapter);
         // Required for getChildAt(int) in ViewPagerBottomSheetBehavior to return the correct page
         pager.setOffscreenPageLimit(NUM_CONTENT_FRAGMENTS);
@@ -355,12 +355,10 @@ public class AudioPlayerFragment extends Fragment implements
         updatePosition(new PlaybackPositionEvent(controller.getPosition(), controller.getDuration()));
         updatePlaybackSpeedButton(media);
         setupOptionsMenu(media);
+    }
 
-        if (media != null) {
-            List<Chapter> chapters = controller.getMedia().getChapters();
-            boolean hasChapters = chapters != null && !chapters.isEmpty();
-            pageIndicator.setDisabledPage(hasChapters ? -1 : 2);
-        }
+    public void setHasChapters(boolean hasChapters) {
+        pageIndicator.setDisabledPage(hasChapters ? -1 : 2);
     }
 
     @Override
diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
index dc27e1f83..6d693f6cb 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/ChaptersFragment.java
@@ -128,6 +128,7 @@ public class ChaptersFragment extends Fragment {
         disposable = Maybe.create(emitter -> {
             Playable media = controller.getMedia();
             if (media != null) {
+                media.loadChapterMarks();
                 emitter.onSuccess(media);
             } else {
                 emitter.onComplete();
@@ -146,6 +147,7 @@ public class ChaptersFragment extends Fragment {
             return;
         }
         adapter.setMedia(media);
+        ((AudioPlayerFragment) getParentFragment()).setHasChapters(adapter.getItemCount() > 0);
         int positionOfCurrentChapter = getCurrentChapter(media);
         updateChapterSelection(positionOfCurrentChapter);
     }
diff --git a/app/src/main/res/layout/main.xml b/app/src/main/res/layout/main.xml
index 60b9623bc..6da514b4a 100644
--- a/app/src/main/res/layout/main.xml
+++ b/app/src/main/res/layout/main.xml
@@ -18,7 +18,6 @@
             android:layout_height="match_parent"
             android:layout_alignParentTop="true"
             android:foreground="?android:windowContentOverlay"
-            android:layout_marginBottom="@dimen/external_player_height"
             tools:background="@android:color/holo_red_dark" />
 
         <FrameLayout
@@ -27,6 +26,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:background="?android:attr/windowBackground"
+            android:visibility="gone"
             app:layout_behavior="de.danoeh.antennapod.view.LockableBottomSheetBehavior" />
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DBReader.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DBReader.java
index f30cbcd05..c30f46315 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DBReader.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DBReader.java
@@ -590,9 +590,6 @@ public final class DBReader {
                 if (!list.isEmpty()) {
                     item = list.get(0);
                     loadAdditionalFeedItemListData(list);
-                    if (item.hasChapters()) {
-                        loadChaptersOfFeedItem(adapter, item);
-                    }
                 }
             }
             return item;
@@ -608,8 +605,7 @@ public final class DBReader {
      * than one FeedItem because this method might query the database several times for each item.
      *
      * @param itemId The ID of the FeedItem
-     * @return The FeedItem or null if the FeedItem could not be found. All FeedComponent-attributes
-     * as well as chapter marks of the FeedItem will also be loaded from the database.
+     * @return The FeedItem or null if the FeedItem could not be found.
      */
     @Nullable
     public static FeedItem getFeedItem(final long itemId) {
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
index 428312393..8ea08f463 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
@@ -44,8 +44,6 @@ import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
 
-import java.util.concurrent.ScheduledThreadPoolExecutor;
-
 /**
  * Communicates with the playback service. GUI classes should use this class to
  * control playback instead of communicating with the PlaybackService directly.
@@ -53,18 +51,13 @@ import java.util.concurrent.ScheduledThreadPoolExecutor;
 public class PlaybackController {
 
     private static final String TAG = "PlaybackController";
-
     private static final int INVALID_TIME = -1;
 
     private final Activity activity;
-
     private PlaybackService playbackService;
     private Playable media;
     private PlayerStatus status = PlayerStatus.STOPPED;
 
-    private final ScheduledThreadPoolExecutor schedExecutor;
-    private static final int SCHED_EX_POOLSIZE = 1;
-
     private boolean mediaInfoLoaded = false;
     private boolean released = false;
     private boolean initialized = false;
@@ -74,15 +67,7 @@ public class PlaybackController {
     private Disposable mediaLoader;
 
     public PlaybackController(@NonNull Activity activity) {
-
         this.activity = activity;
-        schedExecutor = new ScheduledThreadPoolExecutor(SCHED_EX_POOLSIZE,
-                r -> {
-                    Thread t = new Thread(r);
-                    t.setPriority(Thread.MIN_PRIORITY);
-                    return t;
-                }, (r, executor) -> Log.w(TAG, "Rejected execution of runnable in schedExecutor")
-        );
     }
 
     /**
@@ -155,7 +140,6 @@ public class PlaybackController {
         } catch (IllegalArgumentException e) {
             // ignore
         }
-        schedExecutor.shutdownNow();
         media = null;
         released = true;