This has been bugging me for some time (months or years) already. Took me some amount of testing to realize it's a Vector 2022 skin issue for logged in user only. (Initially I wanted to report scrolled-out beginning of anchor links, generally.)

I am not 100% certain this is not a duplicate issue (but tried searching). But have found possibly related closed one: T310424: Vector 2022's sticky header overlaps Who Wrote That's banner (which i then took some little inspiration from for this reporting)

In some cases, it seems that during the toolbar appearance, page is scrolled correctly anyway. (And, precisely. Unlike as for section links, where a couple of lines above the section header from the previous section are visible too.)
Not sure what exact conditions are needed, but it happens during the same browsing session with the same link, in minor amount of cases.
Btw, I almost always do open these links in a new tab (Ctrl+click).

I can reproduce this in latest Firefox with safemode so no gadgets are involved: https://en.wikipedia.org/wiki/Wikipedia?safemode=1#Decline_in_participation_since_2009

It seems to behave same way for

• enwiki {{Anchor|…}} template (example, w/safemode)
• raw HTML anchor <span class="anchor" id="…"></span> (corresponding to the template output) (example, w/safemode)
• the same with no class, <span id="…"></span> (example, w/safemode)

Yup, I experience this issue very often. I've started changing some shortcuts to point to a header rather than an anchor, if both are placed in the same spot, to fix it.

At a first glance, this report seems potentially similar to T406114: When opening a link to an anchor in Vector 2022, the target is partly hidden behind the sticky header?

@A_smart_kitten Right, it seems to be describing essentially the same problem. I did not see that one. I would not be against merging.