Lightmaper doesn't bake

Hi!
I have a pretty big problem with our project and totally got out of ideas how to deal with it.

Before, we worked on unity 2018.1.9 f1. Lightmapping for city and rest terrain was taking around 15-20 mins what was pretty good and acceptable time. Now we updated project to 2018.3.3 and baking doesn't work.
It get stuck on "preparing bake" or "baking", Tbh nothing changed in project since we was baking on 2018.1.9.
No errors, no crash, it just doesn't go further.

We have scene for light settings and light objects (this is scene where I'm baking light) and second scene for city. I'm getting warning that my scenes have different lighting settings but even if I remove all scenes and load a draft one it still doesn't bake. But it worked with this setting on 2018.1.9
New fresh project works well.

My light setting is mixed with baked indirect. I'm attaching my lighting window


I think something is wrong with whole project, but we don't have idea what.