Anchor link within page creates odd header behaviour

Hi there,

Thanks for this amazing theme I’ve been using for 8 years now :-)
I’ve created two hashes within a page and two anchors supposed to scroll towards these two hashes.
I’m facing two issues :
1) When I click the anchors, it brings me too far below the hashes. I’ve checked paddings, margins, etc. but there is nothing I can do to make it right.
2) After clicking the anchors, when I scroll back up to the top of the page, all my content is set higher than usual and goes behind the (sticky) header.

I’ve found no way around it and I really need your help on this :-)

Thanks a lot

Cheers
Caroline