Shadows of small movable components popping out

This must be a regression

1) new map with the floor, delete directional light, place point light so it affects the ground, make sure its set to stationary
2) build lighting
3) place a static mesh so it casts a shadow on the ground, and scale it down so it's pretty small. change to Movable. Move in and out and see that the shadow pops in and out.

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