Ghost mushrooms

Hi, so I'm looking for ghost mushrooms . I've looked around its various location even the famous fungal rock cave where supposedly they are abundant and have a swift respawn. I've found none. I also check the AH and no results have appeared either. I wait the next day, look around its usual spots again, nothing. I assumed maybe its bugged, BUT when I checked the AH again I've only found one seller who have the ghost mushrooms! Though it costed me 1000 gold for 10 which is pretty high, but I was that desperate. That alone got my hopes up, so Off I go search for the shroom again, BOOM nothing. my herb tracking is on keep in mind. So weird. Has this occurred to anyone too? Or My luck is just that awful?

only place i found ghost shrooms was in maraudon. not sure wuts up with the spawns but they do not appear ANYWHERE else at least for me when i checked.