Erroneous Polygon Object collision with Edges

My student is creating a game in which a shape falls along a path dictated by a line the player creates by clicking. It works really well with circles but with triangles he encountered this glitch. This is a low priority error since he'll just have the player directed object stay a circle but I thought you guys should be aware of it. Here is a video for reference:

https://user-images.githubusercontent.com/20031683/179632484-743d5423-2ed7-4c68-bc69-29acb6ec8493.mov