After clicking on a section edit link, we show a loading bar but do nothing else. When the editor finishes loading we scroll the heading to the top of the page instantly.
On mobile there is a smooth scroll bringing the heading to the top of the page so there is no jump when the editor finishes loading.
We should copy this behaviour to desktop for the same reasons we implemented it on mobile.
This would not apply when the page-level edit link from the sticky header is used, so that feature (T296910) would remain unchanged.