I am looking at a site where there is an extra
<br> tag being inserted between all elements in rich-text fields in custom fieldsets, including between list items! And two being inserted between paragraphs. The html is clean in the editor, but this is how it's being rendered on the front-end. This is only happening when the fieldset is set to display as a tab. As soon as you move it 'inline', the problem goes away. Site is using default CKEditor.
Any ideas about why this could be happening and how to fix it? Thank you.