When I open activity 1 (Main/Launcher activity of the app), that includes MediaBrowser connection, MediaBrowser.subscribe works ok (onChildrenLoaded
MediaBrowser.subscribe
onChildrenLoaded
Temporary solution:
move MediaBrowserCompat.connect() from onStart() to onCreate(), and move MediaBrowserCompat.disconnect() from onStop() to onDestroy(). It works now.
Must be fixed in v25.4.0: https://issuetracker.google.com/issues/37133265#comment3