What happened:
Fieldcraft levequest "Salad Days" - the 8th gathering node never appeared. The usual red circle for where to hunt for a node appeared, but further nodes appeared, and none were found by using the Arbor Call ability. I also ran around the entire area, checking rooftops and inside buildings, using Arbor call to see if there was some hidden indoor node - no luck. 7/8 nodes appeared, and although I had already gathered over the required number of items, the leve failed because there was no final node.

ISP TWC, 50mb
Around 09:45 PM EST today

Re-challenged multiple times and one field only has 3 spawn points instead of 4 so this leve can not be completed. Seems this issue has been reported around the beginning of November so it seems it is ongoing.