Confirmed. After disabling Tipbuddy, nodes started getting picked up. After reenabling Tipbuddy, nodes previously picked up still showed on the map; new nodes were not picked up.
BTW, one thing that confused me was the filtering function. The tooltip says "filters out selected nodes" - which to me implies that if I select a particular node type, it won't be picked up or shown on the map. In fact, it seems to work in precisely the opposite way.