[BUG] All mythstones gone

Hello all, ive been having a lot of fun playing battle tap having made it to floor 151 prestiging and on floor 89 now. But last night i fell asleep while playing with 37 mythstones and woke up this morning with 0. It wouldn’t be much a problem if it wasn’t so many and i wasn’t about to get my next artifact for 40 mythstones.

Has this happened to anyone else? Does anyone know a way to recover them?

Thanks for any help.