So this is weird. In both M and M2, I can't save. It looks like the save takes (no errors, the comment is updated, a new slot is taken, etc.) but if I quit the app and restart it, the save isn't there.
I tried loading an existing save, which worked. I then immediately saved to the same slot with an updated comment. The comment appeared in the save slot. When I exited the app completely, then restarted it, the comment reverted to the original comment, not the updated comment.
I tried loading an existing save, moved to another save point, and saved to the same slot with the same comment. When I exited the app completely, then restarted it, my zone reset to the original point, not the updated save point.
I tried loading an existing save, moved to another save point, and saved to a new slot with a different comment. When I exited the app completely, then restarted it, the new slot was empty.
I tried creating a new game, went through the intro, and saved to a new slot in the tent. The save and comment seemed to work, but when I existed the app completely, then restarted it, the new slot was empty.
I installed M from scratch and couldn't save. I installed M2 over M and still couldn't save. I installed M over M2 and also couldn't save.
Is anyone else having this issue? I'm rooted but on stock ROM (LG G3.)