I’ve noticed that every time someone makes an edit, it looks like there was no previous edit and that the person wrote the whole thing. I looked at their profile and they had written one thing but it wasn’t the article I saw. I’m using Google Chrome. I’ve only noticed this bug today at 5:00 PM EST.

This is not a bug. The previous version displayed in RC Patrol is the last patrolled edit on that article, electing to instead condense and display all unpatrolled edits on the right side. This occurs when someone creates an article and someone else edits it directly afterwards.