The via stub check only measures vias. Plated through-hole pins on fast nets leave the same open barrel and are skipped. Back-drill clearance to other nets is not checked, no fab page found publishes a back-drill tolerance, and the EM cross-check never ran because the heavy queue did not reach it.
From the Grok pain-radar digests, Oct 31-Nov 1 2026 (Oct 31 9:41 PM ET through Nov 1 7:41 AM ET digests plus the Haitch overnight edition). Verified live 2026-11-01: issue/PR read; title and state confirmed.