[MC-148876] Exception ticking world while loading chunks

While loading chunks in a straight line out from 0,0 at a relatively fast pace, server crashes with "Exception ticking world". Crash frequency appears to be directly related to the rate at which world loading occurs.

Time: 4/20/19 1:11 PM
Description: Exception ticking world
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
at java.util.ArrayList$Itr.next(ArrayList.java:859)
at bhu.a(SourceFile:72)
at vg.a(SourceFile:317)
at net.minecraft.server.MinecraftServer.b(SourceFile:827)
at ug.b(SourceFile:343)
at net.minecraft.server.MinecraftServer.a(SourceFile:764)
at net.minecraft.server.MinecraftServer.run(SourceFile:632)
at java.lang.Thread.run(Thread.java:748)