Creating a copy of BSP after fliping it in geometry edit mode cause the copy to be invisible

Branch Build Label
UE4-Main Promoted-CL- 2270796
 
DESCRIPTION:
If a player goes into geometry edit mode and flips a bsp then makes a copy of it the copy will appear invisible
 
ADDITIONAL NOTES:
AnswerHub post: https://answers.unrealengine.com/questions/90439/can-you-copy-primitives-after-you-flip-them-in-the.html
Possible workaround is to change BSP copy from additive to subtractive
 
FREQUENCY:
3/3
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REPRO STEPS - [Reproduced Internally]:
1. Launch: UE4Editor.exe   (any project)
2. Bring a BSP cube into the level
3. Enter geometry edit mode and flip the cube
4. Use alt + drag to create a copy of the BSP
 
RESULTS:
BSP copy will not be visible.
 
EXPECTED:
Created copy to appear in the fliped
ENVIRONMENT:
OS: Windows 7 Professional 64-bit
PROCESSOR: Intel(R) Xeon(R) CPU W3550 @ 3.07GHz (8 CPUs), ~3.1GHz
RAM: 16 GB RAM
VIDEO CARD: NVIDIA GeForce GTX 770
DRIVER: 325.23
SOUND SETUP: Headphones
DIRECTX: DirectX 11

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