I select some cells, do Data -> Pivot Table. I get the dialog box. As I drag items from "Available fields" to the "Row Fields", etc. boxes, the boxes become black.
Steps to Reproduce:
white boxes become black
white boxes stay white
User Profile Reset: No
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Firefox/52.0
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Created attachment 132740 [details]
It will take you longer to download the test file than to make one yourself. It's not the data but the actions that show the bug.
This is a duplicate of 82009, which is unfixed.
I'm getting this too on OSX 10.10.5, with LibreOffice 18.104.22.168
*** This bug has been marked as a duplicate of bug 82009 ***