Once a week I log into my druid alt to fly around and try and gather enough Marrowroot and Windowsbloom to make my flasks and pots for myself.
And it seems that within Revendreth and Maldraxus in particular you can go to a herb and start gathering and then it disappears.
You can also see the herb on the ground and go down to it and then it disappears.
You can fight off mobs near a herb and watch it de-spawn before your eyes …
It’s ridiculous. So are the prices for these two herbs on AH.