QAGame projectile collisions are not working

I was not able to repro this with template projects in //UE4/Release-4.17. I was not able to repro the lack of collision to the same static mesh I shot at if I tried to run into it. That is why I mentioned the projectile collision specifically in the summary.

This is a regression going from //UE4/Release-4.16 to //UE4/Release-4.17 as this was working in 4.16. Additionally, QAGame and its content is utilized in a variety of our engine's test suite and this would block many of those tests.

Mason mentioned:
"Changing some of the other settings in the Static Mesh Editor fixes it as well. Such as Vertex Override Color"

Repro:

1. Open QAGame into the project editor.
2. In the Modes pane, drag and drop a Basic Cube into the Viewport
3. PIE - Viewport and shoot the cube.
4. Run into the cube

Result:
Projectiles pass through anything you shoot. Trying to use the physics gun doesn't interact with anything.

Expected:
Projectiles collide with objects they hit, and the physics gun can pick up objects.