Just stumbled upon a unforeseen circumstance:
Simultaneous dying and gaining a level causes the game to break and loop. Mobs are spawning, the ending message box disappears and the character is gone.
The only way to get back is by ESC > Restart or Exit.
Apart from that I am going for my last 64 EXP in order to unlock the knights special skill :)
The time needed to fully complete a character feels exhaustively long compared to the EXP gained. How do the others feel about it?