Coastal definition design bug

The bottom right hand sector of the island (South Eastern Corner) has a number of coastel inlets / bays. The second bay up from the bottom of the eastern coast has part of its view obscured by a clump of trees and all looks good. However when these trees are cut down to reveal the full coast line then it show a design bug to the coast line. Instead of a fully defined bay a square segment block of land protrudes out into the sea. This is very easy to notice once the trees are cut down.
Regards.
Spondoolix