You are not alone in experiencing this bug. I’ve linked the competitive bugs megathread at the bottom of this post, which archives and documents almost every competitive bug. I put your thread under: Not Appearing On Leaderboards (Season 6). Please help in spreading the word about this megathread and other related threads regarding these issues.
Here’s a potentially relevant thread about console career profile bugs if you would like to bump this up as well: Career Profile Stats (Console): What's Wrong?