Convex collisions hulls fails when any of the X, Y, Z axes are equal or smaller than 2 units. There's a fallback spherical collision box being generated when this happens but its positioning sometimes is offset and it doesn't correctly represent the shape in question. In my opinion, it should fallback to a square collision box that inscribes the shape a bit better, instead of the spherical one.
Convex collisions hulls fails when any of the X, Y, Z axes are equal or smaller than 2 units. There's a fallback spherical collision box being generated when this happens but its positioning sometimes is offset and it doesn't correctly represent the shape in question. In my opinion, it should fallback to a square collision box that inscribes the shape a bit better, instead of the spherical one.