I have brought this up a lot, and nobody seems willing to put effort into fixing it. In many boss fights (including Pierre, Von Bon, and Palpatus) there is a bug that makes you unable to respawn (regardless of the number of lives you have left). Players often tell me this is a "very rare" bug that occurs if you jump while healing, but it happens almost once a week, and this is NOT my fault!
I'm sick of wasting a daily attempt and losing XP on these bosses. WHY won't anyone even TRY to fix it?