Not buying it, especially when the bug always has you going down 2 spots.
If it were a delay, I would randomly go up 2 spots some of the time, but no. It's always going down after a win.
There is never a "delay" in which I gain 2 spots.
Also it is not visual. I've stayed in that same rank since I last played. No updated rank, even days later after this same exact win.