In Realms World, the portal from that main island to remote island has become strange. There was no problem until just before I used it.

Remote island→main island portal is no problem, but main island→remote island portal isn't normal. If I use main island's portal, I am transferred to x0y0z0. So I have lost everything...

 Similarly another Realms member(iPad,Switch user) try to use main island portal, they transferred to x0y0z0. So I think it's Realms World problem but user's problem.