Pokopia Bug: Jump ability lost after reload (Magikarp quest glitch)

Hi, I encountered a game-breaking bug regarding the jump ability.I successfully completed Magikarp's quest, built its habitat, and unlocked the jump ability. After that, I advanced to the tower in front of Tangrowth, where I saved and closed the game.Upon restarting, my jump ability was completely gone. However, Magikarp is still moved into its habitat, which prevents me from triggering the quest or talking to it for the reward again. I am now stuck and cannot progress. Please help! Otherwise i have to refund the game. I put too many hours into the game.