Thanks Usha. I've fixed the issue with the canopy, and the dustbin. The blue line is the line renderer, used to drawn paths, so I've repositioned this, so it starts out of sight.
Preventing any clipping whatsoever or small imperfections on maps is unfortunately going to be very difficult and time consuming. This stems from the fact two layers exist, an underlying, tile based data layer and a visual layer comprised of 3d objects. There are quite a few nuances to making these layers decent approximations of one another and it becomes increasingly time consuming, the better the approximation is. I'll definitely fix any errors I have made in mapping the 3d layer onto the data layer (like in your park example), but smaller examples of clipping are going to be harder to manage.