Particles teleport when using plane collision and spawning under the collider.

1. Open TestScene from attached project.
2. Select Particle System in the Hierarchy.
3. Observe the Particle System transform in the scene view and how its particles are appearing on the other side of the plane.

Expected outcome: particles to move uninterrupted and ignore the reverse side of the plane collision.

Notes:
- Not a regression: reproes from 5.3.1f1 to the newest 5.5 on trunk.
- Behaviour should probably be similar to particles spawning within a mesh in world collision with a disabled internal collisions.