Game Not Loading Tracks Properly

Hi All,

So I have an issue where currently after doing a championship or two, the game starts doing stuff like this (Windows 10 PC version):

Imgur

Does anyone have any ideas why this is happening? Basically makes the game unplayable - game becomes extremely laggy and it’s almost as if things are not being loaded correctly. Stuff pops in and out as I drive along (e.g. the ground, tire walls, stands, all scenery). It also causes stutters and affects everything. Oddly if I pause the game (which takes an age) when the pause menu does load in it suddenly loads everything in around me, only to then go back to this as I drive further on.

I have a PC more than capable of handling the game.