When generating the Integrated Dungeons and Structures "Ancient Mine" the underminer causes a large hang.

Full Thread Dump: https://pastebin.com/GKjjP7zN

"Server thread" #188 prio=4 os_prio=-1 cpu=676593.75ms elapsed=2995.51s tid=0x000001fd74f87250 nid=0x6d34 runnable [0x000000b5edefe000]
java.lang.Thread.State: TIMED_WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00000004ea87f7a8> (a java.lang.String)
at java.util.concurrent.locks.LockSupport.parkNanos([email protected]/LockSupport.java:252)
at net.minecraft.util.thread.BlockableEventLoop.m_5667_([email protected]/BlockableEventLoop.java:152)
at net.minecraft.util.thread.BlockableEventLoop.m_18701_([email protected]/BlockableEventLoop.java:142)
at net.minecraft.server.level.ServerChunkCache.getChunkBlocking([email protected]/ServerChunkCache.java:2262)
at net.minecraft.server.level.ServerChunkCache.m_7587_([email protected]/ServerChunkCache.java:2158)
at net.minecraft.world.level.Level.m_6522_([email protected]/Level.java:179)
at net.minecraft.world.level.Level.m_46819_([email protected]/Level.java:4054)
at net.minecraft.world.level.StructureManager.m_220477_([email protected]/StructureManager.java:48)
at net.minecraft.world.level.StructureManager.m_220491_([email protected]/StructureManager.java:124)
at com.github.alexthe666.alexsmobs.entity.ai.MonsterAIWalkThroughHallsOfStructure.getNearestStructure([email protected]/MonsterAIWalkThroughHallsOfStructure.java:71)
at com.github.alexthe666.alexsmobs.entity.ai.MonsterAIWalkThroughHallsOfStructure.m_7037_([email protected]/MonsterAIWalkThroughHallsOfStructure.java:33)
at net.minecraft.world.entity.ai.goal.RandomStrollGoal.m_8036_([email protected]/RandomStrollGoal.java:52)
at net.minecraft.world.entity.ai.goal.WrappedGoal.m_8036_([email protected]/WrappedGoal.java:22)
at net.minecraft.world.entity.ai.goal.GoalSelector.m_25373_([email protected]/GoalSelector.java:98)
at net.minecraft.world.entity.Mob.m_6140_([email protected]/Mob.java:725)
at net.minecraft.world.entity.LivingEntity.m_8107_([email protected]/LivingEntity.java:2546)
at net.minecraft.world.entity.Mob.m_8107_([email protected]/Mob.java:517)
at com.github.alexthe666.alexsmobs.entity.EntityUnderminer.m_8107_([email protected]/EntityUnderminer.java:425)
at net.minecraft.world.entity.LivingEntity.m_8119_([email protected]/LivingEntity.java:2291)
at net.minecraft.world.entity.Mob.m_8119_([email protected]/Mob.java:318)
at com.github.alexthe666.alexsmobs.entity.EntityUnderminer.m_8119_([email protected]/EntityUnderminer.java:271)
at net.minecraft.server.level.ServerLevel$$Lambda$61656/0x0000000805ddc788.accept([email protected]/Unknown Source)
at net.minecraft.server.level.ServerLevel.track([email protected]/ServerLevel.java:10240)
at net.minecraft.server.level.ServerLevel.redirect$fia000$onTickNonPassenger([email protected]/ServerLevel.java:10256)
at net.minecraft.server.level.ServerLevel.m_8647_([email protected]/ServerLevel.java:658)
at net.minecraft.server.level.ServerLevel$$Lambda$61654/0x0000000805ddbf08.accept([email protected]/Unknown Source)
at net.minecraft.world.level.Level.m_46653_([email protected]/Level.java:457)
at net.minecraft.server.level.ServerLevel.m_184063_([email protected]/ServerLevel.java:323)
at net.minecraft.server.level.ServerLevel$$Lambda$61646/0x0000000805ddace8.accept([email protected]/Unknown Source)
at net.minecraft.world.level.entity.EntityTickList.m_156910_([email protected]/EntityTickList.java:54)
at net.minecraft.server.level.ServerLevel.m_8793_([email protected]/ServerLevel.java:303)
at net.minecraft.server.MinecraftServer.m_5703_([email protected]/MinecraftServer.java:866)
at net.minecraft.server.MinecraftServer.m_5705_([email protected]/MinecraftServer.java:806)
at net.minecraft.client.server.IntegratedServer.m_5705_([email protected]/IntegratedServer.java:84)
at net.minecraft.server.MinecraftServer.m_130011_([email protected]/MinecraftServer.java:654)
at net.minecraft.server.MinecraftServer.m_206580_([email protected]/MinecraftServer.java:244)
at net.minecraft.server.MinecraftServer$$Lambda$60117/0x0000000805baf010.run([email protected]/Unknown Source)
at java.lang.Thread.run([email protected]/Thread.java:833)

Locked ownable synchronizers:
- None