I just ran into the strangest bug (it will be difficult for you to duplicate and thus fix - I was a software manager before I retired to teach chess). I was playing normally on my Ipad - Acct 147196734 - when all of a sudden I noticed my Evo Thunder God was now level 92! I stared at it for a while making sure my eyes were not deceiving me. So I flipped the game out of Ipad RAM to restart it, and when the game restarted the TG had now returned to its proper level of Evo 199. Strange...
I had the same issue a couple of months ago, with my devo Siren.
I was checking my altar and noticed he was at level 120, not at 200. I took a screenshot to have some graphic proof, closed the game and when it opened again, she was devo 200 as usual.