DDX and DDY no longer work properly close to the camera in 4.21 on Android in OpenGL ES 3.1.  Worked in 4.20, no longer works in 4.21 or 4.22.  Originally reported as Oculus Quest specific, but repros on Pixel XL in Open GL ES 3.1.

Does not repro on Oculus in -opengl mode or in -featureleveles31 on Windows, so seems to be Android specific.

Steps to Reproduce
  1. Open[Image Removed] (project was named when bug was thought to be Oculus Quest specific, but repros on Pixel XL in non-VR non-AR modes).
  2. Launch Test level on Android
  3. Move camera as close to the surface of the chair as possible
  4. Observe odd rendering [Image Removed]

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Won't Fix
ComponentPlatform - Mobile
Affects Versions4.224.21.2
Target Fix4.23
CreatedMar 29, 2019
ResolvedJul 9, 2019
UpdatedSep 16, 2019