see this screenshot
that submission box appears every time I click refresh
Why is that?
There is no such thing coming in my browsers.
Perhaps the main difference is you are logged in to the site and I am not.
Can you please check in any other browser where you are not logged in.
That might helps
If you would like to look in to the issue you can PM me the login details
I have also checked in my safari browser in ipad and there is no form inside the website without logged in.
I guess it might be the css editor or any other form loaded after you logged and it throws the warning to you.
I can see that you are using Chrome in Mac OS.
I have tried in Chrome PC. In addition to Zebra's suggestion of "being not logged in"
You may tried in the same browser by using "New incognito mode" of chrome(by click the right hand side 3 line corner to choose).
So it can test in the same browser while eliminating other factors including extension in Chrome that might cause problem sometimes.
This message is from the browser; and it will display anytime you try to refresh a page that was displayed as the result of a POST request.
It has no bearing on your code, the browser will display the same message on all websites where you try to refresh the page (hit F5 for example) which was displayed as a result of a previous POST request.
To prevent this from happening, make sure all POST requests redirect to a different view upon completion; and not render templates themselves.