game crashed after demon seige win(?) 1st carbuncle wave 4 or 5?

game crashed after i tried to solo a demon siege, i was not prepared for a breacher who wiped me and the two people who rushed over to clean up the imp blood.

the game said the elven pants retreated right as the breacher died . the elven pants being the enemy kingdom who attacked me maybe the crash has something to do with that.