Okay, so if I click on a world that already has an eu instance everything works fine, it will show it at the beginning. But if a world doesn't have an EU instance it will basically transform a US instance for example to a EU one but it will still give me the payer count of a US instance. If I join that world it will bring me to a EU instance, the player count updates and I'm the only one in there.

This whole thing is really fucking confusing, so I made a video to explain it further.