Running MIUI 8 now! Feels smooth!
Trough twrp First:
Miui8 zip
Open Gapps
Super su2.76
This gave a boot loop!
Second try:
MIUI 8
Open Gapps
SuperSu 2.46
Works!
Same issue here. Spotify at the background stops playing music.
Tried to lock the app and disabled battery optimization in settings. Unfortunately it did not helped