ProBuilder emissive materials vs Lightmapper.

Hi.
Emission light from emissive objects created by ProBuilder and SabreCSG (so it's not ProBuilder only behavior) not get baked by lightmapper. Lightmap is completely black.
Attenuation from any light sources works okay.
With the same material a MeshRenderer with a box MeshFilter baked correctly.
All meshes static, all settings are double checked.
Does anybody know workaround or something?

 

I am using custom RP (neither HDRP or LWRP). But i've tested with stanard pipeline - baked correctly. So you are right, it's my render pipeline broken. Should to check that earlier. Can you suggest a direction, where I should go to find solution? Custom editor for shader already adding MaterialGlobalIlluminationFlags.BakedEmissive.

 

Nvm, I've found the solution. Not pipeline, but MetaPass of shader was broken. "Cull Off" in MetaPass did the trick. But thanks for direction. Solution was found in LWRP commit, fixing same problem.