What version are you running?
3.0.31
What's the URL of the page containing the problem?
It is not public. However, I see the same on demo: go into http://demo.reviewboard.org/r/1562/, and click into issue (http://demo.reviewboard.org/r/1562/diff/1/?file=7466#file7466line666). The 'diff' tab will be opened but will not scroll into file.
What steps will reproduce the problem?

create review, add some issues
go into 'reviews' tab, scroll down into issues and click into any file path
'diff' tab will be opened but will not scroll down into selected file/line


What is the expected output? What do you see instead?
I expect that after clicking into particular issue will bring me into diff tab and scroll down into this file
What operating system are you using? What browser?
rb-site is on centos 7, but I use firefox 65.0 from Ubuntu 18.04.1
Please provide any additional information below.