Eyedropper doesn't work on groups
When I select a group and I try to use the eyedropper tool, this seems to not work.
In the fill box in the toolbar it appears as the colour already changed, but the group still looks with the original colour.
If I ungroup the group, or if I unite the group with the pathfinder (plus cmd+8), then the eyedropper works regularly, but this is not the ideal way to work. I already contacted the support online, but the issue hasn't been sorted out properly.
I use MacOS High Sierra — Version 10.13.6

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David Craig commented
Sometimes when I use the eyedropper tool to change the color of text or objects, the fill color says it has changed, but the object looks the same. For example, in the screenshot, the text is selected and the fill color says it should be purple, but it is black.
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Dana commented
I have the exact same proplem. Only when I use it on a group, It does seem to apply the stroke color/ weight, but the fill color stays the same. Once I ungroup, it goes back to its original look...