Reproduction steps:
1) Open users submitted project, proceed to scene "ParticleSorting"
2) Go into playmode and hit "Rotate emitter" GUI button.

Notes:
1) This happens on Mac (both editor and standalone)
2) Changing simulation space to world prevents them from flickering in distance sorting mode, though other sorting modes still flicker(even without rotating the emitter).
3) In the scene view flickering stops at certain angles and distances.

Expected result: After emitter is rotated you should see particles sorted by distance.
Actual result: Particles flicker - they get sorted in front of closer particles and back again.

Reproduced with: 5.4.0b3 5.3.2p2
Emitting particles with emitparams was introduced in 5.3

Notes:
- OSX only - not reproducible on Win 10.