Google cast groups disappeared with version 6.3.0.882

[Srt49]

Google cast groups was visible and working before. I got both Google cast audio and Sony devices X88 & X77 working in groups (but not a Sony dn1060). Now after an update all groups disappeared from Spotify and only individual devices are visible. All groups and devices work with other players like Google play. Whats up?

[Srt49]

All groups with exception of those that include the Sony DN-1060 seems to be "back". Why is spotify treating Google cast groups differently than all other casting players?