I recently purchased Gt sport....stay with me....I purchased digital and was going to download. Estimated 5 hrs...googled how to download faster. Says make sure you have all system updates. I checked notifications there was one 5.20.20.
Usually you cant play online without update but for some reason this ypdate it allowed you to play online without that system update.
Went to buddies yesterday kept getting disconnected from Cod...told him to check update...he had it too. Fixed.
Playing today with Bro on cod...complaining about disconnect...asked him to check sure enough his problem too.
Not saying this might be your problem but just wanted to put it out there