Not entirely sure what has happened, but in current master pressing my URL hint shortcut makes them show up, but pressing the associated number doesn't open the URL. I'll try to bisect to figure it out later.
I just looked at the new url hints code, and I'm not entirely sure how it is supposed to work, it seems like it will always select the wrong one? And doesn't work at all with just one hint.
Seems like there is some issue with URL filtering in general now, I suddenly got a URL hint (underlining) in the wrong place as well (can't reproduce it, though).
A possibly relevant merge request was started @ https://invent.kde.org/utilities/konsole/-/merge_requests/258
Git commit da3014859fb8428bed788cabed01476bf3cc6f72 by Martin T. H. Sandsmark. Committed on 27/10/2020 at 12:27. Pushed by hindenburg into branch 'master'. Fix URL hint triggering M +2 -6 src/filterHotSpots/FilterChain.cpp https://invent.kde.org/utilities/konsole/commit/da3014859fb8428bed788cabed01476bf3cc6f72