Same for me unfortunately. Some of my releases (with more than one track) now have random track order instead of the intended one (which is specified in the album feed). Everything was fine until the latest update. Both the web- and phone app seem to be affected.

I've noticed that I'm not alone with this problem.

This is just one example:
https://fountain.fm/album/55sNHI1tuY6XNjZYDlaz

The correct track list should be:
1) Resonance
2) Tell Me All Your Secrets
3) Whispering Stars
4) Silent Prayer
5) The Lost Serenade
6) Where Do All The Broken Pieces Go

I hope this helps.