As happened in T95122 (initial situation solved due to FF bug resolved), when you have collapsed sections (manually for example) and go up and click on a sub heading on of that top level heading, the page will focus on the top level section, without expanding.
As a user, when clicking on a subsection link on the table of contents I want to see the content of the subsection in my screen so I can see what I want to read.
- Visit https://en.m.wikipedia.org/wiki/USB on tablet
- Collapse History section
- Go to TOC at the top
- Click a subheading of history e.g. USB 3.1
- Page should focus on USB 3.1
- Parent section History and Version history should be open