Material Ambient Occlusion Does Not Work With Skylight Set to Movable

Material ambient occlusion does not work with the skylight set to movable. Setting the material to allow static lighting will fix the issue until the level is reloaded.

Found in 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4234136

1. Open attached project
2. Open "AOTest_Inst" and enable the override parameter and change its to any value between 1 and 0
3. Change both the skylight and directional light to stationary
4. Repeat step two

Results:
The ambient occlusion will not be present while the lights are set to movable but works with it set to stationary or static.

Expected:
The ambient occlusion would show the same regardless of the mobility setting set in the skylight or directional light