Today riding through fuego flats on my way to epic kom there was constant flickering of horizontal lines and slanty lines through the screen, like rendering problems. I have a high end pc which is up to date and had no issues on any other parts of the watopia world, just in the desert. This coupled with the volcano disappearing riders bug seems to have only appeared in the last update. Also there is a bug that if you press a key to do a u turn right on an intersection you get put into a constant endless loop of riding circles and have to end the game to get out of it.
I fear these bug issues are delaying the next update by a week already.