Title pretty well says it. I have a workbook with multiple sheets and had noticed that I was unable to copy and paste charts from one sheet in particular. Initially I was trying to duplicate a chart (in order to change the data set slightly and compare) and was unable to Ctrl+C, Ctrl+V. Also could not copy/paste elsewhere (i.e. Word). Right clicking shows the option to copy (or cut), but it didn't seem to make it to the clipboard. Further investigation (opening the clipboard in excel) showed that it was not in fact making it. What was strange was that I could copy other charts from the same workbook (different sheet) just fine. In trying to determine what the difference could possibly be, I noted that the problem charts all had data labels. Sure enough, removing the labels fixes the problem. However, I want those labels when I paste the chart into Word. Current workaround is to paste as a picture. Labels were custom, but same problem exists with non-custom (eg. using the Y-value as a label).
Office 365 for Windows 10.