Hi @hatakka and welcome to our adorable Community 😊 Please check if your game is up to date. There were quite a few updates since this level so your game probably needs to be updated.
Thanks for tagging me @firebombmarkus. @hatakka, are you saying that you are showing stars on levels that you have not completed yet? Could you please do a print screen and upload it here. If you need help with a print screen, please follow the steps on here:https://www.take-a-screenshot.org/