Anything that is typed into the Quote tool is deleted from any article. This happened when viewing the article in the world then switching back to edit mode.
Use the quote tool to type text into a quote, then view the article in the world, then switch back to edit the article.
Anything typed as a quote is deleted from any article occuring after view in world then returning to edit.
Which editor are you using?
Same here. This is using the Visual Editor.