As finally everything seems to be working (including all the keyboard shortcuts) and it’s finally possible to make lingQs without that annoying jump to the next yellow word (which made using keyboard for reading texts a real pain), I just wanted to say:
A big thanks (and kudos) to the developers! 
Using LingQ keyboard-only for importing and reading things like books has finally become a really pleasurable experience. I already find myself spending much more time using LingQ just because of that single change alone. So, thanks again!