Steps to reproduce the issue

I only have one override that showing as different on my test site and that is /templates/mytemplate/html/com_users/registration/default.php (aka components/com_users/tmpl/registration/default.php here on Github)
Open file and 'Show differences' = yes.

Expected result

To see the complete files - both original and override

Actual result

Last 10 lines missing. See screenshot:

System information (as much as possible)

Additional comments