The first particle burst emitted from a mesh/mr/smr as a sub emitter appears to emit all its particles forward (direction of the parent emitter) from a single position (not outwards from a random vert/edge/tri as expected). The rest of the bursts work as expected.

In scene view every burst behaves as the first burst in play mode.

Same result for birth, collision and death subemitters.

Note: Tested with Skinned Mesh Renderer, Mesh Renderer and Mesh source types. This behaviour is consistent across all. Works as expected with Mesh type on V5.2.2f1.

Reproduction Steps:

1) Open attached project then open "Test.unity"
2) Select "ParticleSystem-Death"
3) Observe the sub-emitter not emitting from its skinned mesh correctly
4) Press play
5) Observe how the first sub-emission does not work correctly but every burst after works as expected.
6) Disable "ParticleSystem-Death" and enable "~Birth" or "~Collider"
7) Observe the same issue

Regression from V5.2