Michael Condrey has tweeted out that Sledgehammer Games will be preventing users from joining sessions in progress in Ranked Play mode in Advanced Warfare with the next patch. This month is only the pre-season for Ranked Play, with Season 1 set to start in December.
@PREVAILFAME next patch prevent joining sessions in progress. Plus more for rank play. Pre-season still in progress to work out the kinks
— Michael Condrey (@MichaelCondrey) November 22, 2014
There’s no time frame of when this patch will be released yet. Stay tuned.