Possible Ranking Bug

Ran into a strange thing with my ranking tonight in Swat playlist. Prior to playing tonight, I was ranked platinum 2, I think, then this happened:

My friend was playing so I joined his fireteam. Once his game finished, I was brought in and matchmaking started. My friend is ranked in Onyx tier in Swat. Needless to say, I did not do well during the match and our team lost. When we got back to the menu, we went to switch playlists and this is when I noticed that my Swat rank was now Onyx 1500. Not sure if that’s working as intended, but thought I’d report it here in case it’s a legitimate bug.