Fixed this now (at least I think so). Don't think it was just an issue with the most recent patch but has always been there with the bosses. But of course this scenario not very likely to happen that often. Also made the (boss) levels not allow to overlap with the hand so much.
As a side note, congrats on the number one spot on the leaderboards. 🎉 Awesome score! How long did the run take? As you've probably played it quite a bit, do you have any things you'd like to see added/improved etc?