@dalamar Have you recent unlock daily task? If so... if you were collecting beforehand? That what screws up most players daily task.
Focus task is your friend in collecting... But it has a 200ish range in marking collectable nodes. Also some node spawn in some area of the region. Not everywhere and you might have a collection node on far ends of the region or type of terrain only.
Recently people report of nodes not spawning after 24 hours. This is because of server lag and high instance traffic preventing the spawning. This also cause spawning to not visually appear if one just passing by and not waiting for the load. Next real maintenance they likely fix most of these issues.