As written, check 4's condition (dual-surface AND value flipped anywhere)
was a strict subset of check 3's (value flipped) — if check 3 read zero,
check 4 was vacuously zero and added no independent signal. Compare the
value each surface actually reported instead, and state plainly that any
disagreement is also a check-3 flip: this check's job is attributing such
a flip to binding divergence. Matching fix applied to the live PostHog
tile (insight jQi7QdW1, dashboard 1918875).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>