Is there a limit to how many world quests you can track at a time? I tried to track all the champions quests but it keeps dropping some.
I believe WQs count in the 25 total quest limit in the quest log. Which also means that non-WQ quests you’re carrying also count, and would reduce the number of WQs you track.
25 seems to me to be a big number, but if you’re carrying a dozen or two other quests that may not be enough.
Editing: Srilanni below is right; WQs have their own UI limit of four. That’s probably the limit you’re seeing.
Except I think I recall seeing it track five, if one is a pet battle WQ. Maybe I’m not remembering correctly, but I can’t check right now.
You can track 4. Shift-click on each of the WQ’s you want.
Thanks for the answers!
You can actually track five by shift-clicking, and a sixth by directly clicking on it. However, subsequently directly clicking on another quest marker will remove this sixth “tracked” quest and instead track whatever you directly clicked on.
That’s what was happening to me. I would click too many and it would drop some. Thanks!
Another option is an addon like world quest tracker.
You can track by reward type, rep as in champions of azeroth etc. Might be worth giving it a look.
Thanks for the idea! I actually got BFA pathfinder 1 yesterday so I’m putting the world quests on hold and heading for Nazjatar. 
Grats on that.