[bcarr]

Makes me wonder if it’s related to the hydrogen bleed issue that ended up halting the July rehearsal twenty seconds earlier than it was meant to.

[gatonegro]

From what I understand, it's only "related" to the July issue because the rehearsal back then was stopped before they got to testing engine bleed. If they'd finished the WDR properly in July, it's likely that today's problem would've been caught.