I do not know if this may be a bug or there is something wrong, or this is the way it works and you must attach the color control external to the group and not inside, so this I am asking this here
Why happens this?
When I try making a group with a color control inside that has the "allow images" activated and is showing an image, when you group it with other components, then automatically the color control is deactivated the "allow images" if it was active.
So to be able to have again the images allowed inside the group you have to attach and external color control
If you ungroup this group you find what I have said that the color control does not have activated the "allow images"