[2021.2.0b2] Volumetric fog goes black

In the newest beta version, I found a strange behavior of the fog. Volumetric fog goes black, regardless of the color of the back fog. Is it a bug or normal behavior? It never happened before. I am puzzled.

 

It's a bug. By moving the "weight" slider in the volume settings, returns everything to normal. But then, when hit Play, fog turn to black again.

 

Volumetric fog does generally darken and obscure things more than what normal fog does(Especially environmental lighting).
I don't know if it's intended behavior or a bug tbh.

 

I have this warning seems to be somehow connected.

Code (CSharp):

1. UpdateEnvironment readback buffer overflow, please schedule fewer updates.

What the hell is that supposed to mean?

 

Ok, I'm an idiot.

I had this "Probe Volume(experimеntal)" turned on, that's what ate all my memory. Now everything works fine.

 

I am not using hdrp but urp, but getting this on 2021.2.4.
Any way to solve this?

 

I have this spammed all over the log file, can I get rid of it somehow?
What's causing that? Could it be color change that affects GI?
(e.g. blending two skyboxes or tinting them with color?)

 

https://forum.unity.com/threads/upd...-schedule-fewer-updates.1194253/#post-7708519

For me turning off GI solved this, but changing timescale brings it back.