https://www.instagram.com/instagram/
Around 50 pixels length of blank rectangular gray-colored space appears on top of an Instagram profile page pushing parts of the upper panel down making it overlap with other parts of the page.
Web Annoyances Ultralist​​​​​ disabled:

Web Annoyances Ultralist​​​​​ enabled:

In uBO, all options under 'Privacy' are enabled. Nothing under 'Default behavior' is enabled. In Filter Lists, all the filters in the Built-in, Ads, Privacy, Malware Domains, Annoyances and Multipurpose sections are enabled, except for Fanboy’s Social Blocking List and Fanboy's Cookie List​​​​​​​​​​​. Nothing in the Regions, languages section is enabled.
Instagram profile pages appear fine if Web Annoyances Ultralist is​​​​​ disabled.
@AmperAndSand Thanks for the report!
I think I have fixed this, but it's difficult to test for me as it seems to only occur some of the time and on certain screen widths for me, do you mind updating your filters and letting me know if the problem seems solved for you? Will close the issue after that.
@yourduskquibbles The issue now seems to have been solved as per my testing on both Brave and Chrome. Instagram profile pages now appear fine. Thanks!