Moving a component onto another net's via through Konnect's IPC move silently re-nets the copper: KiCad changes the via's net to the moved pad's net. A ground stitching via took on the test point's supply net and the ground plane lost it, while DRC stayed clean. A synthetic repro with KiCad's own Python shows a closed-file move does not re-net, so the hazard is specific to the agent's live move path.
From the Grok ProductFlo pain-radar compilation, finding 56, found 2026-10-05, score 5/5. Verbatim evidence: "a test point moved onto a ground stitching via; the via came back with the test point's supply net, the ground plane lost it, and DRC was clean." Cost model assumes the bad netting is found by git-diffing copper and the placement reworked.