Niagara Sim Cache result from 3D Gas is blocky in Windows packaged game

Summary: Cached 3DGas Niagara system appears blocky in packaged game.

Brought up by a licensee via UDN: https://udn.unrealengine.com/s/question/0D5QP00000a17A40AI/niagara-fluids-simcache-artefacts-in-packaged-game

Their case includes an exe of the packaged result, an image, a zip, and a video of the issue. 

I also reproduced the issue in vanilla 5.4.4 using the default Niagara 3DGas, which was cached and packaged for Windows. 

1. open marketplace 5.4.4 engine
2. enable niagara fluid plugin, restart engine
3. create level (or use default)
4. create 3D gas niagara asset
5. add niagara asset to level
6. create sequence
7. cache niagara asset sim
8. edit the level bp, so that it plays the sequence on begin play
9. package project for windows
10. open exe
11. see blocky sim, instead of expected sim visuals

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