So an issue I've been running into is losing the disableable upgrades if they were disabled at the time I restart the game. So for instance after switching from my android to desktop I lost all my points in Demoralize (it costs points again), I am Bat/Goblin, and Straight-Forward (but I kept Popup Blocker and I am Wolf because I was using those at the time of the save).
I've also occasionally ran into a bug where (because of auto-leave options?) I will enter a battle, but the enemy health icon will disappear.