custom metadata panel doesn't allow copy and paste

Using the Adobe Custom Metadata extension, you can't copy or paste text from fields like a bag or single text. You can select the text in the relevant field, but copy/paste acts on the selected image instead. This causes the user to duplicate images instead of trying to copy a metadata value from one image to others.

This massively reduces the useful of using the panel in conjunction with AEM or for any QA workflows.