Hi, this game is currently still in development. Thanks for the feedback! I have never experienced this bug. Are you able to provide a way to reproduce the bug? What order of steps did you do?
The sun and moon cards behave a bit differently and swap from human to wolf form (all other tarot cards do the same summoning thing), and currently you have to click the move button to move mode if a tarot card is selected. I'm wondering if that could have been the issue, as the UI is not entirely clear.