Portal and / or Portal gem Issue

Hello, when i'm running dominus since 3/4 weeks i have sometimes a little bug when i set my portal on the dom roof.
Normaly portal should always appear where i'm but in this case he just appear in the stairs even if i trying to set a new.

Exit and enter the area solve the problem.

Thanks for reading.

Note: i lost my screenshot
Note2: just seen the bug report chart sorry didn't read it before you can delete post.