Using the stable one produces errors because it isnt supported anymore by musicbrainz. Therefore it makes sense to set 0.12.1 as stable. Reproducible: Always Steps to Reproduce: 1. search for an album 2. album can’t be listed. therefore the application has no use. 3. updating to 0.12.1 solves the problem.
I will request the stabilization in 2 weeks. Please test latest revision and report issues