What version are you running?
3.0.14
What's the URL of the page containing the problem?
/r/{review_request_id}/
What steps will reproduce the problem?

Create a new review without a diff, for example using the api
Go the new review request and upload a file: Update --> Upload diff 
The diff is uploaded but it is not displayed
In Safari (only) refreshing the page the diff is displayed. 


What is the expected output? What do you see instead?
In previous reviewboard version (3.0.8 for example), after uploading a diff file, the diff was automatically displayed for verification before publishing the review. 

In 3.0.14 after uploading the diff, the diff header doesn't appear. 

What operating system are you using? What browser?
MacOS, Safari. For chrome and firefox the diff is not displayed after publishing the review request.
Please provide any additional information below.