I've also gotten two minor variations of "the queen refuses to fight, dies anyway" (before first transformation, the 'respect' lines, and after, with "don't want to hurt you", then locked controls and <dead>)
Interestingly, once in the previous bugged/looped sequence, the method of incinerating the body never changes. It just stays at 'keel down and touch' and never moves to picking up the adventurer's body, even if continuing the fight sequence. Dunno if that gives any clues as to the source, but just in case it might help!