Mobile particles not rendering in 4.14

After upgrading to 4.14 from 4.11 my particles no longer appear when:

  • Running on device (iPhone 6)
  • Running in Editor in Play Mode “Selected Viewport” with Preview Rendering Level “Default Mobile” (on Mac)
  • Running in Editor in Play Mode “New Editor Window” with Preview Rendering Level “Default Mobile” (on Mac)

They do appear when:

  • Running in Editor in Play Mode “Mobile Preview” with Preview Rendering Level “Default Mobile” (on Mac)

Any ideas on how to fix this? Thanks.

Upon further investigation, if I enable Mobile HDR then particles work in Mobile Preview and on device (iPhone). If I disable Mobile HDR then particles don’t work in Mobile Preview as described above nor on device (iPhone). Can someone confirm if this is a bug in the Engine?