What version are you running?
2.6.x
What's the URL of the page containing the problem?
Any review request page.
What steps will reproduce the problem?

Go to any review request for which you don't have edit rights
Click on "review" to create a review for the review request
In the review dialog, enter some text into the header input
Hit reload


What is the expected output? What do you see instead?
Because the editor was "dirty" and the data wasn't persisted, I believe we're supposed to show an onbeforeunload dialog warning the user that they might lose some data.
What operating system are you using? What browser?
Firefox Nightly 47.01a
Please provide any additional information below.
This goes for replies to reviews as well. Create a reply, put some text in without hitting "OK", and reload the page. No onbeforeunload dialog.