Hi! Do you remember what other cards there were on the board, i.e. Curses and Blessings? And what your own creatures had? This could help me find the issue.
It could also have to do with the Overcharged debuff. If a creature of yours was triggered too often, it could have gotten the Overcharged debuff, thus triggering the "Enemy Debuff" of your enemy. Do you think that's something that could have happened? If yes, I can work on making that more apparent, or think about changing Overcharged to not count as a debuff.
In any case, I will check the code just to make sure I did not miss anything in regards to Enemy Debuff.
Thanks for the report!