Strange white line on equestrian center and snow making cracks in ground

My horse was in a jumping competition and after it was over a white line appeared on the equestrian center. It moves around when I move the camera, but disappears if I move away from the equestrian center. I sent my sim and her horse home, and it's still on the equestrian center when I went in map view and then zoomed in.
https://i.imgur.com/xcTDobx.jpg

Edit: Also is there a way to fix the glitch where snow is making cracks in the ground? Not my picture, but my game looks similar to this. http://simscommunity.info/wp-content/uploads/2018/06/Screenshot-2731-1024x573.jpg