I think I encountered a bug with the Summoner Hero Card. I summoned an earth slime and after the battle the game still thinks the slime is in my party. For some reason this completely messes up my controls in the map and when I change locations I'm teleported one tile before I should teleport. Playing the card machines and letting the minion die doesn't help any.
EDIT: I think I know why the controls are a bit messed up. The game thinks I'm controlling the slime in the map, and since it doesn't have a sprite in the map, it's invisible, but it's there and my character is just following