Road/road texture shows in transparent edge of road texture

Been noticing a white line in what appears to be a transparent edge to the road texture.
At first I thought it was a blank texture with some white text on it (like a default blank texture), but when I rode Alpe du Zwift for the first time yesterday and got up to a high elevation it became clear that the white line was actually the jungle road at the lower elevation showing through a transparent edge in the road.

seems to be a graphical bug.

Don’t look too closely, you’ll see a lot of those around.

Screenshots… where are the screenshots!!

screenshots added but much much easier to see when riding and its moving.

At the turn into sector 12 you can actually see all the road and graphics of sector 13, same goes for sectors 10/11