Why a Pawn no longer collides to a Cube when converted to StaticMesh?

I’ve set up a simple map with a floor and my character on it. I’ve added a Cube and when running the game my character gets blocked by that cube. The moment I convert the Cube to a StaticMesh, the character no longer collides with it. I checked the collision settings of the Cube and StaticMesh and they are just the same. What am I missing?