MC version : 1.12.2

1. Place any lightning source from this mod (inverted better)
2. Break it
3. Reload world

Not work on lamp

Noticed the same bug playing on a server. After placing an inverted light fixture and breaking it, the light will go away temporarily. When I reload the world, there is light ghosting in the same areas where I had put the light fixture.

By replacing a new light fixture where I had the old one and breaking it again, the light again goes away, but only temporarily. The ghost light source returns on world load.

This looks to be an FMP bug. Happens when a light-emitting part is removed from world. Investigating...

Fixed via CBMultipart commit: TheCBProject/CBMultipart@5e49e3d