[Server thread/ERROR]: Encountered an unexpected exception
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) ~[?:1.8.0_222]
	at java.util.HashMap$KeyIterator.next(HashMap.java:1469) ~[?:1.8.0_222]
	at net.minecraft.server.v1_8_R3.EntityTracker.updatePlayers(EntityTracker.java:175) ~[spigot.jar:git-TacoSpigot-"95870a93"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:865) ~[spigot.jar:git-TacoSpigot-"95870a93"]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) ~[spigot.jar:git-TacoSpigot-"95870a93"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:715) ~[spigot.jar:git-TacoSpigot-"95870a93"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:618) [spigot.jar:git-TacoSpigot-"95870a93"]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]