only problem I found was when you beat the first boss and go to endless mode, eventually the lust stops working, the battles finish when you just use an attack once, rather than how the mechanics meant to work, which is that it only works if you dont attack them. I dont know exactly when this starts, but I am at the point where enemies have 9 digit health.
in the video, the first enemy is how long it takes for them to fall in love without me doing anything (with all my buffs) the second and third enemies are me attacking and them falling in love instantly, which I believe is the bug. Most likely you won't see this, but in the unlikely case that you do, I hope it helps! :)