I am not regenerating Arena orbs! Why is this happening? What can I do? Follow
Did the game app crash while you were in the Arena?
If this happens too often, the game will temporarily restrict your Arena Energy regeneration. You will have to wait a while for it to resume, or you can gain a level to restore your Arena Orbs.
Happens when you leave and close your app right before you lose, which is how most people avoid having recorded losses and losing points. When this form of cheating (or strategy) is caught, your arena orbs will not regenerate, but it resets every time you level up or win/lose another arena match.