Editing Material, texture % amount problem

When creating a material, adding a texture, I am unable to change the value % of the texture, and unable to get back when deselect it.

Open new file,
create simple colored texture
Add reflective
add an environment, and by default the value of it is 100%, so it override the color.
Now if i change the % value, or if I unchecked it, nothing appear and change…

Version 6 WIP 6.16 or 6.17, on two different computers

Thank you for your help


Does anyone using RhinoMac has the same problem, or is it only on my computer?

Thank you for your help