I have the problem that mana does not flow toward my character like it does on the steam version. It just sits there. For example, when I open a chest, I have to wait for the chest to dissappear before I can pick up the mana, because it sits inside the chest model. It also makes it much more difficult to pick up mana during the action.
I also got this problem, I can't even pick up the mana from the crates after they've disappeared but maybe it's a bug in the offline mode, couldn't test it online since that doesn't work either.