BungeeCord problem with Multiple Worlds

Hello,

I have a BungeeCord with Lobby and Server1.
When I go at a Minecraft generatet world (end,world,nether) at this Servers. Then its ok.
After Restart my Orig. Minecraft Launcher I can connect to this servers.

BUT When I Close my Original Minecraft Launcher and left the Server at a generated World with Multiverse Core Plugin or Multiworld Plugin. Then I can´t Join THIS Server ! My Launcher Crashs ! I must first delete my playerdata (lalala.dat) to Join the Server.

Also when I close my...

BungeeCord problem with Multiple Worlds