Hi,
I’m using 4.16.2. I don’t know if this issue happened in 4.16.1.
I was using source radius to prevent my mesh from blocking the point light it was paired with. That worked until now. If the mesh is visible at all, the light will not affect the world.
I traced it to the material. I was able to get around the problem by making the material two-sided. Then it works fine. But since that wasn’t necessary before and I don’t see any info about it now, I thought I’d bring it to your attention.
For now, two-sided is fine.