Volumetric Lightmaps noise with GPU Lightmass

Hi, I’m not able to make use of volumetric lightmaps if they are baked with the GPU. The results are really noisy regardless of the settings I use. Are volumetric lightmaps still not supported or am I doing something wrong?

I attach a video were the problem can be seen.

Video with Issue

SOLVED!
Just in case someone else is having this issue, I increased the quality of the baking and now the noise is gone.
It seems like low samples on the global ilumination affects the volumetric lightmap accuracy…somehow.