The connect_to_net and connect_pins tools resolve a reference plus pin number by taking the first placed symbol with the pin, picked by file order. With two Device:R symbols both referenced R4, the call wired one of them and answered isError: false; the netlist showed the second R4's pin as unconnected, and nothing in the response said the second R4 exists.
From the Grok Haitch pain-radar compilation, finding 12, found 2026-10-03, score 9/10. Verbatim evidence: "Result: isError: false, with the wire drawn from (180.34, 116.84)" while the netlist listed the twin as unconnected-(R4-Pad1). Cost model assumes the floating pin is found in netlist review and re-wired.