Found while testing T282030. The issue seems to be only in betalabs so far.
- Go to an article with Add link suggested edits.
- In the context item click on 'Yes' button - the placeholder image will flicker.
Note: The attached screen recording displays the flickering; I was not able to capture it with gifs and when .mov format gets converted (to be displayed in Phabricator) the flickering effect is lost.