Fix entity counts drifting after server restart#270
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This was referenced Jun 29, 2026
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…h tests Follow-up to BentoBoxWorld#270. Now that onEntityAddToWorld re-populates entityIslandMap on chunk reload, entries can safely be dropped on chunk unload — previously they were retained because nothing rebuilt them, which (after BentoBoxWorld#270 mapped every loaded entity) let the map grow unbounded for entities that never reload. onEntityRemove now removes the UUID on the UNLOAD cause. Also drops the no-op ignoreCancelled on the onEntityAddToWorld handler (EntityAddToWorldEvent is not Cancellable) and adds JUnit coverage for the new handler and the eviction: - map population for loaded living entities - non-tracked entities, non-game-mode worlds and spawn islands skipped - already-mapped entities skipped without a redundant getIslandAt lookup - UNLOAD evicts the mapping without decrementing the count - a reloaded entity that dies off-island still decrements (the BentoBoxWorld#270 bug) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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entityIslandMap was transient — lost on every restart. Entities loaded
from chunks never re-entered it, so off-island deaths/despawns failed to
decrement. Added EntityAddToWorldEvent handler to repopulate the map.