Using the now playing screen in multi window mode crashes

[nvllsvm]

• Open Audinaut to the now playing screen
• Split the screen
• Get crash

FATAL EXCEPTION: main
Process: net.nullsum.audinaut, PID: 10135
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setVisibility(int)' on a null object reference
	at net.nullsum.audinaut.fragments.NowPlayingFragment.setAlbumArt(NowPlayingFragment.java:945)
	at net.nullsum.audinaut.fragments.NowPlayingFragment.setupSubtitle(NowPlayingFragment.java:810)
	at net.nullsum.audinaut.fragments.NowPlayingFragment.onSongChanged(NowPlayingFragment.java:788)
	at net.nullsum.audinaut.fragments.NowPlayingFragment.onSongsChanged(NowPlayingFragment.java:854)
	at net.nullsum.audinaut.service.DownloadService.lambda$onSongsChanged$12$DownloadService(DownloadService.java:1790)
	at net.nullsum.audinaut.service.DownloadService$$Lambda$12.run(Unknown Source:6)
	at android.os.Handler.handleCallback(Handler.java:790)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:164)
	at android.app.ActivityThread.main(ActivityThread.java:6494)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)