Thanx for the report, I'll try to check it out.
sorry, I actually meant the third boss, basically I was invulnerable despite having 0 health and 0 curse, and did constant damage when touching a weak spot; character animation was frozen in the sliding position and that continued even during the power-up animation between bosses. I was also completely immobile, so i had no way to damage the last boss and had to reload the page.