Entering the example dimension on a server twice -> Internal server error on client

[Emanulator]

Server output:

2022-10-25` 21:37:34 [WARNING] Failed to handle packet: java.lang.IllegalStateException: Failed to add player. net.minecraft.src.EntityPlayerMP@19 already is in chunk -10, -11
java.lang.IllegalStateException: Failed to add player. net.minecraft.src.EntityPlayerMP@19 already is in chunk -10, -11
at net.minecraft.src.PlayerInstance.addPlayer(PlayerInstance.java:37)
at net.minecraft.src.PlayerManager.addPlayer(PlayerManager.java:86)
at net.minecraft.src.ServerConfigurationManager.func_28172_a(ServerConfigurationManager.java:62)
at net.minecraft.src.ServerConfigurationManager.sendPlayerToOtherDimension(ServerConfigurationManager.java:224)
at net.minecraft.src.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:378)
at net.minecraft.src.NetServerHandler.handleFlying(NetServerHandler.java:179)
at net.minecraft.src.Packet10Flying.processPacket(Packet10Flying.java:26)
at net.minecraft.src.NetworkManager.processReadPackets(NetworkManager.java:210)
at net.minecraft.src.NetServerHandler.handlePackets(NetServerHandler.java:54)
at net.minecraft.src.NetworkListenThread.handleNetworkListenThread(NetworkListenThread.java:79)
at net.minecraft.server.MinecraftServer.doTick(MinecraftServer.java:396)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:300)
at net.minecraft.src.ThreadServerApplication.run(ThreadServerApplication.java:20)