"Join Game" button sometimes missing

On Xbox, when a friend is in a match, I can highlight their name in my EA friends list within the game and it'll show what match they are in and how many players are in it. Then I can press the left stick in...to see more options and usually there will be an option to "join game". However, sometimes that option will be missing for no reason. I've experimented using my Xbox and my girlfriend's PS5 since we both have the game and it is very inconsistent whether that "join game" button will appear or not when one of us is trying to join the other one who is already in a game...and there seems to be no pattern to it. It also sometimes happens on her PS5 if I repeat with her trying to join me and my Xbox when I'm already in a match, so it seems to happen to both consoles. I'm attaching a picture with the "join game" button missing and one picture showing it there.

Edit: I've come back to add more info. I think the "join game" button might be missing all the time when an Xbox player tries to join another Xbox player. This is based on me with my Xbox trying to join two different Xbox friends who are already in matches. I've never seen the "join game" button show up in either of their in-game social pages. However, if I use my Xbox and try to join my girlfriend on her PS5, the button always seems to appear...so far at least. Also, it might always be appearing when a PS5 player joins another PS5 player...at least so far it seems that way. I do know that when my girlfriend on her PS5 tries to join me on my xbox, the "join game" button is sometimes there but sometimes missing...so in that case it is intermittent. Thought all this info might be useful since the problem seems much easier to replicate between two xboxes trying to join each other.