Ancient guardian crashing caves

There is a game-breaking bug that crashes the entire cave system that occasionally happens when fighting the ancient guardian (AG). To put into context, this happened in a Klei official server (Beehive US East) and it has happened more than once in different playthroughs. Both times, the entire cave becomes deleted after the the interaction where AG charges into a pillar. While the caves are deleted, players on the surface are fine. We tried rolling back to the day before the fight occurred to revert the bug but this causes the server to crash altogether.