More iOS 11 problems

I experience three types of problems with SmartPlaylist in iOS 11 (since 11.2):

1. The app as a whole, like many other apps as well, is very often restarted after having used another app. Before you used to be back in SmartPlaylist where/how you had left it.
2. Loading titles and saving the playlist now takes much longer than before.
3. The user interface freezes up to 8 seconds (!) when you press on another song to play or even just pause/play a song. This has been reported by other developers in the Apple developer forum as well - but no fix from Apple yet ...