Minor irritation with featured image caption

Have noticed that the featured image caption is now limited to one visible line. You can have more than one line in the caption, but can only see one line at a time.

Anyone else notice this? It’s by no means a show-stopper, but it is irritating, since I put attribution links under many of my featured images.

Is this in the editor, or in the theme?

In the editor. Comes out okay once published.