Seems like there's a bug with the riverbed fragments and skill locking. When I battle, lose, and retry, the locked skills are suddenly usable. If I lose and retry again they're locked, and it seems to alternate between locked and unlocked for each consecutive retry. This is on Windows.

I've encountered a soft-lock with the fragment that is fought from the snowfield, where if I use Doomed on Rita and have her use Indomitable it works as intended, then the next turn I use Elusive Winds on Rita on the second turn, it works the way it should. But on the third turn when she gets hit by the beckoning it will do 4 damage and then soft-lock the game. 

Found an interesting one by accident, you can softlock yourself in Location A of the Mill on the Third Locus by doing the following:

1. Move Lyra somewhere towards the middle of the bridge in Location A
2. Save the game
3. Quit to title (closing the game accomplishes the same thing)
4. Load your save
5. Use the Eidoscope twice

After that you should be on the lower floor with no way to get back up.

It's currently nearly impossible for me to progress through the museum in the second locus because my game will consistently freeze within a few minutes of loading my save. I can tell that the game is still working, because I can hear the audio of the fight playing out, but the entire screen is frozen. I had this freeze happen once or twice before getting to that point in the game, but it only started happening consistently in the museum.

for some reason its constantly giving me image load errors

In the first riverbed fragment room, you can head down immediately after entering the room and walk out of the map, minor issue though since you can walk back in