Okay, so i've tried
many KODI 17 versions now.
Official releases, nightlies, test builds... they all suck.
Music, party mode - crashes the app every time.
Sometimes after one song, sometimes after ~3 songs.
Loading screens all over the place - if you enter the video addons window, if you've just opened an addon, if a video just closed...
so many f***ing loading screens.
Oh, but they introduced a great new feature in recent builds:
The back button on the remote is not working anymore. 
Stay with KODI 16 as long as you can.