We used to be able to click on a reference (bringing up the pop-up with the edit button), copy, and then paste within the article or even between articles if you had both pages open in VisualEditor. This was very useful since it allowed editors to quickly reuse the the same source without using the "reuse" tab, which often got unwieldy and slowed down performance on long pages. Recently, doing this instead just produces [x] in plaintext upon pasting. Is there any way to get the old functionality back?
EDIT: Chrome 69.0.3497.100, macOS High Sierra 10.13.6, Vector