Can not connect to world (Minecraft pe)

So my brother and i have played minecraft pocket edition since it came out. We’ve connected worlds and numerous devices over the years and had no problems. So i promise this problem is not from lack of experience.

Lately when we play custom maps from the minecraft store in the actual minecraft app we get the error message “unable to connect to world”. this only happens from the store maps. Any rando generated map we connect just fine.

THINGS WE HAVE TRIED

-made sure we are both connected to same wifi

-updated minecraft version to the latest version

-tried several different devices

-unfriended and refriended each other on xbox live

-made sure all settings allow multiplayer

-restarted devices

-both purchased the map incase it was a licensing issue

none of which worked, the only thing that worked was when the host stayed signed in to xbox live account and the people who wanted to join had to log out of xbox live. Frustrating because that cant be the only way to do this! Because we lose our custom purchases
until we log back in ugh

:)