To be honest I have some problems explaining what I mean, which might be why I can't find a solution or explanaition for it.

I use firefox on Linux and out of habit i highlight text while reading it. I always did that and it helps me to read a lot faster and to relax my eyes while reading. It's something i don't think i can get rid of, even if I tried, it's just so deeply burned in.
As well I use to scroll the text I'm reading to the top out of the same reasons or maybe it's just habit as well, but I realised I cannot get rid of it as well :-)

So no to my problem:
Usually this works flawless, i can highlight text and have the cursor where I'm reading in the topmost visible line. But for some strange reason this does not work in the "new" wikipedia layout. where if I highlight text in the upper third of the page it scrolls upwards quite fast which just fucks up everything and makes my day bad. (this behaviour is not present in the old design which e.g. the germand wikipedia still uses)

Is it me?
Is it my browser?
Is there a way to get rid of this, so I can keep my workflow while reading and learing on wikipedia? Is somebody else observing this behaviour?
Where can I even start to look for a solution? I don't even know what to look for.

It truly bothers me, as I'm close to every day on it, and it might be my favorite website.
I heard there is a way to switch to the old wikipedia layout, which might be a workaround. But I actually like the new Layout a lot, so if there is a way to avoid that it would be great :-)

I say that after throwing some caution to air because I understand that every new thing has some initial resistance or pushback due to the "past comfort zone" effect.

But having said that, I feel the aesthetics of the old site was much better than the new one. But then again, I'm from the old-school world who also prefers old reddit to the new one in browsing experience, so my opinion could be biased! But even considering the modern web design, don't you think the black icons on the top right have a somewhat odd look? And the "21 languages" feels a bit verbose, the I10N icon already conveys what that dropdown is about? And finally, that scrollable sidebar on the left looks a tad ugly?

I just hope this is just a beta stage or something of Wikipedia's new version and a better one will evolve soon! But that's just one humble unpopular opinion, me thinks!