Originally Posted by
TypicalGoblin
Sometimes, the nodes tend to lag a little bit. So if you're at 310% flight speed, + various guild/class speed buffs, it can happen that even if you fly right over a node, it doesn't have a chance to appear before you already exited the range (or it appear for 0.2 sec before you exit the range, doesn't letting you enough time to stop it on the minimap).
If you want to test it, the next time you spot a node, fly away, wait like 10 seconde, and come back exactly where you've seen it. Sometimes, it takes more than 5 sec before it appear.
To counter that, i'd suggest you fly in zigzag. You'll cover a much larger aera, and you're most likely to stay in range long enough for it to show up.