Hey,
I have tried setting the lightmap density to where it is almost comically dense, but it is still giving the same results.
This is with cpu lighting though, gpu lightmass gives a much better result with the doors, but that way the static objects look bad, instead of the dynamic ones. (Lesser density gives better results with GPU lightmass)
Example of GPU lightmass bake:
Notice the noise on the wall, also the closest it came to lumen with software raytracing enabled.