Time: October 25th, 2:20 am GMT+2
Frequency: Constant
World name: Excalibur
Character name: Lana'lein Fune
NPC name: N/A
Monster name: N/A
Class/Level: Lv 40 Botanist
Party or solo: Solo
In-game time: 9 p.m.
Area and coordinates: Coerthas Central Highlands, (X:10,Y:18)

Steps:
1.: Activated the guildleve, "Plague of Both Our Forests",
2.: Farmed 7 nodes, but was unable to farm the 8th, since it would not appear in the world.

This is the same issue, wich the lv. 35 leve "Catch my drift" have.