Translucent Unlit Materials render at incorrect Z depths depending on camera

Sprites which are layerd on top of one another in a tight pack and have a material set to TranslucentUnlitSprite Material will disappear while moving the camera above and below the editor's 0 grid. (May have some connection to TTP# 342905.)

SCREENSHOT?              
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From User on AnswerHub:
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1.  Extract the Attached TranslucentSort.zip file
2.  Open the SpriteTranslucency.uproject file
3.  Move the Camera Above and Below the Editor Grid (0,0,0)
  
RESULTS:
Depending on camera position, sprites will disappear
  
EXPECTED:
Sprites should be rendered always