ktorrent will work with this magnet link which is from kickasstorrents website:

It dosent work with this one though from theoldpiratebay:

Strangely enough qBittorrent will work fine with both. When I say it dosent work I mean it takes a long time to find any peers, 5-10 minutes plus, it never really gets started tbh. Any ideas what causes this? What makes one of those magnet links different from the other? Any settings I can change in ktorrent to fix this?