Steps to reproduce:

1. Open the attached project (my project)
2. Go to the 'Lighting' window and re-build the lighting
3. Press play
4. In the game window, on the right side, there is a particle system with the same light, but it's not bouncing off the surface

Expected: On the left side, there is a spot light with bounce and the red lights are bouncing from the surface like they are supposed to.

Reproduced on: 5.5.0b5, 5.5.0b4, 5.5.0b3