Point light stops emitting when duplicated

I have imported a house mesh that is a set of walls. If I placing point lights around the house (to act as wall lamps), some of them seem to stop emitting light when I duplicate the point light more than twice. It’s like the mesh can only handle receiving light from two lights and it’ll exclude previous lights.

This is the result with two lights:

result with two lights

This is what happens if I make a third light and drag it to another part of the house. The wall stops receiving light from the first light

result with a third light