How do I trouble shoot physics engine collision?

I’m working on an isometric car racing game for a school project, I had a demo working, then I tried to use the physics engine. For some reason the physics engine collision isn’t working like I expected it to. Collision seems to happen well before the sprites actually collide. We are using a box shape on one sprite and a polygon on the other. Does anyone have any tips on how to trouble shoot this?

Did you try the temporary image to help you visualize the physics collision mask?

Beware that there’s a bug regarding Physics collisions in v137.
Upgrade to v138, and make sure to use the Physics hitbox as explained above.