Problem with portals

Hi guys! hope you can help me.
Some time when I try to embed a rem into a portal… instead of doing it it just addresses me into the actual rem I am trying to embed. like it just show’s me where the rem is… I then try another rem and it works, its very frustrating as I don’t know if I am doing something wrong or if the rem has a particular configuration that doesn’t allow it to be embedded into a portal.

Would really appreciate your help

KR

Guido