Can you show us how you have your group built as I can't replicate this issue..?
The Eyedropper tool CAN color groups. So I would suggest you don't have a regular group. Try Expand first.
The Eyedropper tool CANNOT color groups. As you CAN see in the video.
I turned a text into a vector object. Tried to color it, doesn’t work. Expanded the object. Tried to color it, doesn’t work. Ungrouped the object. Tried to color it, doesn’t work.
This is an action I’m using for years, almost intuitively. Now it just doesn’t work.
I can assure you it does. I just did it!
One of your items may be corrupt.
Try resetting your prefs.
Telling me it does work and “it’s corrupt“ doesn’t help. Anyway… I'll guess I have to get used to have two more steps to finish the work.
I also said try resetting your prefs, but hey do what you want, I don't have your problem, I can recolor grouped items... I just did it again...
You may want to share an example .ai file.
CC filesharing, DropBox, Google, WeTransfer...