I'm in a Co-Op with my brother, and he changed his name, so he can't access his island, and I changed Mine too, so I'm guessing something like that will happen to me, I'm not sure if only the plugin Developers can do something about it or if Noobcrew/Cyp can do something about it, if you need our old and new usernames, here they are.
His: Old: raikou1221 New: CreeperHunter52
Mine: Old: YoshiDragonite10 New: xTheSilverStar
We wanna play skyblock, but if only one of us can be away from the island at a time, then it will be a pain, but it could just be a bug in the name change system, because it Doesn't recognize his OptiFine Cape, but It recognizes mine.

Thanks, Dragonite

 

If you have the coordinates to your island, then a moderator can teleport you there, and set you up a /homes there, which although isn't really a functional solution in the long run, will at least allow you to play as you would have before, we can also unlock your chests so that you can access any of your old belongings.

<edit> moving to "help" as it seems like more of an accurate place for the thread to be located, PM me if you believe it should be moved elsewhere

 

I found a screenie that I accidentally took on my island with the debug screen up, and these are the coords shown in the screenie:

Hidden Content:

**Hidden Content: Content of this hidden block can only be seen by staff members**

it's not at the exact spawnpoint, but hey, it's on the island

 

hid the coords. Post here when you come online, so we, or any other mod, old coordinate a time to teleport you there.

 

When you are online catch a hold of any mod and direct them to this post and they'll be able to TP you to the island.