Material settings not saved /Textures not being embedded

[onzki]

Hi everyone, I'm not sure if this is a bug or just my PC Here's the scenario:

1. I adjusted a texure /material's color via the edit tab (slider of RGB/HSL),
2. Saved the file and then send it to a colleague #1 offshore for further tasks.
3. After some time, colleague #1 sends the file back, and when I open it- some of my previously adjusted texture /materials, some of it (not all) reverted back to its original colors. By the way, this is the same native .skp file, there were no exporting/importing that happened.

I wonder why? Any similar experience? I assume that all textures' settings are automatically embedded into the file itself when it is saved, am I right?

Thanks for looking! I appreciate your suggestions.