I’ve seen several times.
- I play a game against a stronger opponent.
Then I click in the top right corner => it shows my old rank
- I click on my userid over there => it shows my old rank in a small pop up window (with the old score and error)
- I click again on my userid=>it opens my profile page.
=>I click on my userid appearing in the middle left => it shows my updated rank
- I start a new game
=> I appear (in the game page) still with my old rank
Only I reload the page using my navigator reload button, and I redo 2 3 4 then my new rank appears and is displayed in the new game.
This is with Safari 13.1 on mac os catalina