How do I separate object instances so they don't all activate?

What I'd trying to do is make a sort of randomized node that will choose a value, spawn the appropriate resource node type, and then when you are on top of it and press E, drops the appropriate resource.

The main issue I'm having is anytime I activate a set of actions on one instance, it applies to every instance of the object. Collecting one node causes all nodes to spawn resources. Is there any way to specify each instance to only affect itself?

The picking condition here would be 'player is overlapping object' so it only drops on the instance you are on top of when you press E.