Just finished reading this topic and want to thank you @eklein it is very interesting, too bad not having read it before! I would have saved myself a lot of effort 
Maybe this is the right place to better understand a weird issue I’m having with my archviz render with Eevee… this is the render without indirect lights bake:
and it is quite as expected, but when I bake the lights:
As you can see, all the glasses reflect more light than necessary. There are no lights applied in this corner so I would not expect these reflections, as if the light came from the direction of the observer.
No HDR map applied, only area lights behind the camera.
I tried to use different types of glass without success, including the one shown here:
Any suggestions on how to improve the lighting setup and realism?