Same issue here, I won my last ranked game and got +60 points for that, which brought me to 918 (so Rank 7), but I didn't get the new rank, and leaderboard shows 858 points, so exactly the 60 points from last win are missing.
Edited to add: Played another ranked and won, end-of-game screen showed me going from 912 to over 1100 points??? and showed Rank 8 (and the next threshold Rank 9 with 1100 points), Leaderboard now shows 912 points and Rank 7. So the end-of-game screen is completely messed up is my guess, not the actual points.
I also noticed with wins of the day that the screen would at first show where you'll end up and then add the round wins, e.g. it shows you 2 rounds won when you haven't had anything yet for the day, then deletes the two rounds and correctly counts your two rounds up.