Any opinions on what may have caused this?

Found the #1 intake pushrod in this condition after a run. The rocker, adjuster and lifter all look okay, which surprised me. No indication as to what caused it. The mangled end is the rocker end. 20211010_163544.jpgreceived_563052851584618.jpegreceived_203501011889579.jpegreceived_288293096248918.jpeg