Yes this is happening to me in regular MP lobbies, I'm not leveling properly. My brain tells me it's related to 3arch hoping people don't go afk for the rewards, but my brain is small. One thing, it isn't a visual for me.
edit: Ok my example is not being able to reach prestige 2 from prestige one 55. It was stuck on 2796xp needed for an hour. When it finally worked I prestiged and everything seemed normal. I'm now stuck on prestige 2 lvl 4, no advance and this started on Sunday and it's now Wednesday. Doesn't matter what lobby and friends or no friends.