Ready up issue

[Only1life4me]

My brother has this issue where he has to leave the squad after a match is over and rejoin the squad just to ready up for the next match. If he does not, it will still show that his teammates are in a match when they are just in the lobby. 

[DeezTaters20]

Back to menu of the game and go back in. Only way to fix it.

[Only1life4me]

Why would it only be him out of all the people I play with to have this issue?