after customizing the units, I can't send them into battle or auto deploy them, even though I've got enough mana. Very sad, that something like this bug happens after a few hours into the game.
ok. got it. I haven't used the battle roster tab. I had to reassign it. It is pretty confusing, because in the battle menu, you still can see your units to deploy, but it's just an image i guess.
Hmm, it looks llike a bug cause units are supposed to auto-add to roster if you have enough place there. I will try to reproduce it, thanks a lot for letting me know about the issue.