Why CYAN is default object color (with default materials & shaders)

I trying to beat this problem for a days.
I have a empty 3D project, just created. Materials are default.

Problem: cube (or any different type of objects) color by default is turquoise. (first screenshoot).

• if Environment lighting source = skybox. Everything by default will have turquoise color.
• But Environment lighting source = color. Works well.
• If I'm using custom shader for skybox - it works too.
• If change Environment lighting intensity from 1 to 1.01 or 0.99 this color (turquoise) dissapear.

But how I can make default color with default material to it's normal color (I think it's near to white).

My unity version is 2019.4.23f1

Thanks in advance.

 

Honestly, I have no idea what's going on here. I've never seen that bug. Usually turquoise means an uncompiled shader, but if it goes back to that color as soon as you set the lighting intensity to 1.0 that makes no sense.

The only thing I can think of is ... restart Unity / your computer?

 

Just attached 2 screenshoots with changes Env light intensity

For sure restarting Unity / computer - I tried this.

 

Had the same problem, downgrading Unity to 2019.4.16f1 helped, I think this is something to do with the newer versions