With Flagged Revisions If user without review-right is editing the page where is no pending changes then system will warn editor for his own edits when there is least one edit pending. This works in same way in old wikieditor and visual editor but problem is more pronounced in the Visual Editor.
How to replicate
1.) Go to page which is reviewed with FR and there is no pending changes with
2.) Edit the page with user without autoreview or review -right and save the edit
3.) Re-edit the same page
Suitable test page: https://fi.wikipedia.org/wiki/Merkityt_versiot_-kokeilu/Testisivu_1
How this should work is that the warning is showed only if there is pending changes from other editors than current one. Even better would be if warning could be disabled for users without review right in cases where latest version of the article is shown.
This is something which doesn't bother regular user because they are editing with least autoreview right. Problem however is annoying and it effects pretty much to all ip and new users which are doing more than one edit per article.