The simulated robot's collision bodies leave a gap between 0.04 m and 0.06 m, while the real housing goes to 0.065 m; simulated IR rays at diode height pass through, so two simulated robots do not see each other like the real ones do. The fix has to go into the xacro and five generated URDFs.
From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.