Why did the Shine in the metal texture go out when editing it?

Question

Cinema 4D

the other day I encountered ...
I worked for myself in Cinema 4D on MAC OS , then I transferred the scene home to the PC , and I work without problems ..
HOWEVER! When he began to get into the material like "gold" to twist the shine! - but then, unexpectedly, the shine in the texture went out altogether (((

Although when rendering - there is shine ..
I put the screen:
Why can the shine in the texture disappear as soon as you start editing it?
When the texture goes out - it’s no longer clear what it is .. It 's problematic to work with such textures... it's kind of a bummer))
Maybe there were similar cases
PS: Moreover, Cinema versions are strictly the same.