As the title suggests, a creep can find the object closest by path, but can't find the path to the object?

Context is a creep just entering a new room, and looking for a source to harvest. I refactored the code to find the error, so don't think about the specifics too much.

Relevant code:

I don't understand how creep.pos.findClosestByPath can return an instance of an object, but creep.moveTo(object) can't find a path.

The relevant room; creep position drawn in red