To reproduce:
1. Open attached project
2. Create a particle system
3. Check the "Lights" module
4. Click the circle next to the "None (Light)" field to select a light
5. In the newly opened window, click "assets"
Notice that even though a point light asset exists, the only option the selection window displays is "None".
A workaround for this is dragging the point light asset into the "Light" field.

The same issue is reproducible not only for adding Lights>Lignt, but also for Collision>Planes, Triggers>Colliders. However, the issue is not reproducible in Renderer>Material.

Reproducible on: 5.3.0f4, 5.5.0f2, 5.6.0b2