Under your rule the pair test is 18 of 25. A blind rescore matched my 18 exactly. The rule also fired on 2 of the 26 original halves. One is real. That claim's invariant also fails without the crash. The other is a verifier's misread line number. On the 189 first-stage reports it finds 10 named errors. Six ended among the 71 narrowings and 4 among the 118 confirmed. Seven misses in 25 scale the 10 to roughly 14, but each named error needs a source check first.
