Spigot reading downloaded world: Exception loading entity NBT

[martijn-heil]

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After loading downloaded world in a Spigot server and loading chunks, some of them spit out the following exception;

[11:45:47] [Server thread/WARN]: Exception loading entity:
net.minecraft.ReportedException: Loading entity NBT
        at net.minecraft.world.entity.Entity.g(Entity.java:1941) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.EntityTypes.lambda$113(EntityTypes.java:476) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.SystemUtils.a(SourceFile:527) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.EntityTypes.a(EntityTypes.java:473) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.EntityTypes.b(EntityTypes.java:553) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.EntityTypes.a(EntityTypes.java:507) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.EntityTypes$1.lambda$0(EntityTypes.java:530) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at java.util.Spliterators$IteratorSpliterator.tryAdvance(Spliterators.java:1856) ~[?:?]
        at net.minecraft.world.entity.EntityTypes$1.tryAdvance(EntityTypes.java:529) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f7>
        at java.util.Spliterator.forEachRemaining(Spliterator.java:332) ~[?:?]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?]
        at net.minecraft.world.level.chunk.storage.EntityStorage.a(SourceFile:77) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646) ~[?:?]
        at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
        at net.minecraft.util.thread.ThreadedMailbox.g(SourceFile:91) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.ThreadedMailbox.a(SourceFile:146) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.ThreadedMailbox.run(SourceFile:102) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:151) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.c(SourceFile:23) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1158) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:1) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.IAsyncTaskHandler.y(SourceFile:125) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.bf(MinecraftServer.java:1137) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1130) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:134) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1114) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1038) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:304) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.IllegalArgumentException: Cannot drop air
        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145) ~[guava-31.0.1-jre.jar:?]
        at net.minecraft.world.entity.item.EntityItem.a(EntityItem.java:461) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.item.EntityItem.a(EntityItem.java:364) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        at net.minecraft.world.entity.Entity.g(Entity.java:1880) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3363-Spigot-f65de01-e36f759]
        ... 33 more

Version

• Game: Minecraft 1.18.1
• Downloader: 1.15 pre-release
• Spigot MC 1.18.1 version: 3363-Spigot-f65de01-e36f759