[MC-241608] Snapshot world crashing shortly after starting game

Game crashing when playing snapshot world. Either frames slow to unplayable rates or complete crash. Suspect it's when world save is happening.

Linked issues

"java.lang.OutOfMemoryError" on 21w44a. We're at the 1.18 Pre-release 1 now. See MC-239474.

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We're tracking this issue in MC-239474, so this ticket is being resolved and linked as a duplicate.

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