End Portal teleporting to random location in the nether/overworld

[Field_Mouse]

Ok so this was weird and I dont know why it happened lol, today me and the guys on my server were going to try and kill the enderdragon but when we jumped in the portal we all got teleported to random locations in the overworld via a nether portal one guy got taken nearly 100000 blocks away... Still I dont know if its a mod doing it or some weird bug?

  Thanks a lot

 

[Kalbintion]

Sounds like a weird bug. Is the server using mcpc+ and is it using any plugins? they may be at fault.