ArrayIndexOutOfBoundsException: Index 24 out of bounds for length 24, followed chunk data be lost

Stack trace

[20:20:32] [Paper Common Worker #2/ERROR]: [ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask] Failed to parse chunk data for task: GenericDataLoadTask{class: ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask, world: world, chunk: (23,419), hashcode: 1798463854, priority: NORMAL, type: CHUNK_DATA}, chunk data will be lost
java.lang.ArrayIndexOutOfBoundsException: Index 24 out of bounds for length 24
at net.minecraft.world.level.chunk.ChunkAccess.getOrCreateOffsetList(ChunkAccess.java:461) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.ChunkAccess.addPackedPostProcess(ChunkAccess.java:380) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.storage.SerializableChunkData.read(SerializableChunkData.java:419) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask.runOffMain(ChunkLoadTask.java:355) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.GenericDataLoadTask$ProcessOffMainTask.run(GenericDataLoadTask.java:311) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup$Queue.lambda$createTask$0(BalancedPrioritisedThreadPool.java:429) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.queue.PrioritisedTaskQueue$PrioritisedQueuedTask.execute(PrioritisedTaskQueue.java:345) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup.executeTask(BalancedPrioritisedThreadPool.java:309) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$WorkerThread.pollTasks(BalancedPrioritisedThreadPool.java:592) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.mainLoop(PrioritisedQueueExecutorThread.java:57) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.doRun(PrioritisedQueueExecutorThread.java:122) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.run(PrioritisedQueueExecutorThread.java:49) ~[concurrentutil-0.0.7.jar:?]
[20:20:32] [Paper Common Worker #2/WARN]: Ignoring heightmap data for chunk [-5, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #2/WARN]: Ignoring heightmap data for chunk [-5, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #2/WARN]: Ignoring heightmap data for chunk [-5, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #2/WARN]: Ignoring heightmap data for chunk [-5, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #2/ERROR]: [ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask] Failed to parse chunk data for task: GenericDataLoadTask{class: ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask, world: world, chunk: (-5,419), hashcode: 1436260670, priority: NORMAL, type: CHUNK_DATA}, chunk data will be lost
java.lang.ArrayIndexOutOfBoundsException: Index 24 out of bounds for length 24
at net.minecraft.world.level.chunk.ChunkAccess.getOrCreateOffsetList(ChunkAccess.java:461) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.ChunkAccess.addPackedPostProcess(ChunkAccess.java:380) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.storage.SerializableChunkData.read(SerializableChunkData.java:419) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask.runOffMain(ChunkLoadTask.java:355) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.GenericDataLoadTask$ProcessOffMainTask.run(GenericDataLoadTask.java:311) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup$Queue.lambda$createTask$0(BalancedPrioritisedThreadPool.java:429) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.queue.PrioritisedTaskQueue$PrioritisedQueuedTask.execute(PrioritisedTaskQueue.java:345) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup.executeTask(BalancedPrioritisedThreadPool.java:309) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$WorkerThread.pollTasks(BalancedPrioritisedThreadPool.java:592) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.mainLoop(PrioritisedQueueExecutorThread.java:57) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.doRun(PrioritisedQueueExecutorThread.java:122) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.run(PrioritisedQueueExecutorThread.java:49) ~[concurrentutil-0.0.7.jar:?]
[20:20:32] [Paper Common Worker #4/WARN]: Ignoring heightmap data for chunk [26, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #4/WARN]: Ignoring heightmap data for chunk [26, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #4/WARN]: Ignoring heightmap data for chunk [26, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #4/WARN]: Ignoring heightmap data for chunk [26, 419], size does not match; expected: 37, got: 43
[20:20:32] [Paper Common Worker #4/ERROR]: [ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask] Failed to parse chunk data for task: GenericDataLoadTask{class: ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask, world: world, chunk: (26,419), hashcode: 588050447, priority: NORMAL, type: CHUNK_DATA}, chunk data will be lost
java.lang.ArrayIndexOutOfBoundsException: Index 24 out of bounds for length 24
at net.minecraft.world.level.chunk.ChunkAccess.getOrCreateOffsetList(ChunkAccess.java:461) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.ChunkAccess.addPackedPostProcess(ChunkAccess.java:380) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at net.minecraft.world.level.chunk.storage.SerializableChunkData.read(SerializableChunkData.java:419) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkLoadTask$ChunkDataLoadTask.runOffMain(ChunkLoadTask.java:355) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.GenericDataLoadTask$ProcessOffMainTask.run(GenericDataLoadTask.java:311) ~[paper-1.21.10.jar:1.21.10-129-3e25649]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup$Queue.lambda$createTask$0(BalancedPrioritisedThreadPool.java:429) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.queue.PrioritisedTaskQueue$PrioritisedQueuedTask.execute(PrioritisedTaskQueue.java:345) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$OrderedStreamGroup.executeTask(BalancedPrioritisedThreadPool.java:309) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.BalancedPrioritisedThreadPool$WorkerThread.pollTasks(BalancedPrioritisedThreadPool.java:592) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.mainLoop(PrioritisedQueueExecutorThread.java:57) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.doRun(PrioritisedQueueExecutorThread.java:122) ~[concurrentutil-0.0.7.jar:?]
at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.run(PrioritisedQueueExecutorThread.java:49) ~[concurrentutil-0.0.7.jar:?]

### Plugin and Datapack List

Server Plugins (59):
*AntiAttack, AntiSeedCracker, AntiSpawner, AstraRating, BetterRTP, Blackjack, BustaMine, CatSeedLogin, Citizens, CMILib
 ColorGradient, CompanionsPlus, CopsAndCrims, CoreProtect, DeathMessages, DelayedCommand, DreamCleaner, Essentials, EssentialsChat, EssentialsProtect
EssentialsSpawn, GlobalMarketPlus, GrimAC, GSit, ILoreEdit, Images, Ip2region, JulySafe, LiteSignIn, LuckPerms
 mcMMO, McMmoView, MiniMOTD, Multiverse-Core, NeonRewardPlus, NoCommand, PlaceholderAPI, PlayerGuild, PlayerMenu, PlayerParticles
 PlayerPoints, PlayerSafe, PlayerTask, PlayerTitle, PlayerWarp, *PlayMoney, PointLogger, ProtocolLib, QuickShop-Hikari, RandomShop
 Residence, Sentinel, SkinsRestorer, SpawnLimit, TAB, Vault, VirtualBooks, VoidFramework-Bukkit, WorldEdit

There are 4 data pack(s) enabled: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)], [file/iris (world)]

### Actions to reproduce (if known)

<img width="2215" height="1273" alt="Image" src="https://github.com/user-attachments/assets/774d6221-44d7-4811-a6ec-7a8730c3404a" />


The server was upgraded from version 1.20.4 to 1.21.10, and the map archive was damaged after entering the server. The specific manifestation was the lack of buildings, and the missing parts generated new terrain and blocks

### Paper version

This server is running Paper version 1.21.10-129-ver/1.21.10@3e25649 (2025-12-19T23:34:30Z) (Implementing API version 1.21.10-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.10-2535-0a2dc04 (MC: 1.21.10)

### Other

_No response_

Start with the reported stack trace in net.minecraft.world.level.chunk.storage.SerializableChunkData.read and the calls to ChunkAccess.addPackedPostProcess and getOrCreateOffsetList. Reproduce the failure using the upgraded 1.20.4 map and inspect the affected chunk data; done means chunk loading no longer throws or loses the reported chunk data.