Small bug:
As the title says. I’m finishing my third playthrough, this time on hard. I purposely avoided harvesting nodes (mines, digs, chests, fishing) while being in quest areas and I seem to have confirmed what I thought: if you harvest nodes in quest/cinematics areas, the nodes will not respawn and remain depleted. For example, in one realm where I harvested the silver ore node and opened a chest (in a room blocked by breakable pots, in the marin woods ‘bear cave’), during the ‘Roots that Bind’ quest, the nodes never respawned. This playthrough, I avoided that room and the nodes respawn appropriately.
It’s annoying at worst, but there are a lot of nodes that remain depleted if harvested during a quest, in quest areas. Something to look into.
EDIT: Forgot to add: herbs DO respawn.