Any FLEX_ rule area makes every via and PTH on the board need a teardrop, including ones deep in the rigid ends, and SMD pads on flex are not checked at all. Which vias count as flex is only a naming convention until there is a real declaration of the region.
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.