CQC is very bugged, the odyssey version especially, since release in fact. FDev introduces new bugs very frequently.
In july last year, after a weekly server miantenance, suddently the game was constantly crash to desktop at the end of a game. It has been fixed with U13, in september.
In november with U14, 2 maps are completly bugged, buildings, rocks are compacted, FDev says thay will fix it with U15, end of april.
Odyssey version is suffering of a matchmaking error that kicks you to main CQC menu after the game.
More generally, there are also instancing problems, 2 cmdrs who try to join CQC may never met and fall in 2 different empty lobbies...
That makes a lot of bad things. and i don't even speak of the attitude of some players or squadron who ruin the CQC...
You can play legacy CQC, it is more stable, but the rank progression is not taken in count, and there always has the condor CDT bug.