CPU Particles do not Collide in Standalone or New Window Play Mode on Mac

When playing a game from a Standalone Game or New Window, CPU Particles will not keep their collision on a Mac.

1. Create a new project with no starter content
2. Create a new Particle System
3. Set the Initial Velocity to a max of 10,10,-100 and min of -10,-10,-75
4. Add a Collision Module, setting the Particle Behavior from kill to freeze
5. Place the New Particle System into the level such that it collides with the floor in default level
6. Play as Standalone Game

RESULTS: Particles do not collide with floor

EXPECTED: Particles collide with floor

Fix UE-51650

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

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