Finally someone else noticed Bosch's middle initial... and you all ignored it.
Well, I didn't need his middle initial to know who he was named after. Seriously, Admiral Bosch and Admiral Petrarch?
The Stalwart, for some reason, decided to turn toward the incoming Shivan cruisers, fly through the wreckage, through the node, and forward a couple hundred meters before realizing its mistake and slowly turning back toward the Colossus.
EDIT: I just checked the mission. There's a waypoint called "Behind the node". Fitttingly, it is behind the node. The event "Turn you silly bugger" apparently doesn't trigger fast enough. The Stalwart will be 711.7761189367101629645834788795 meters through the node before the event is triggered and the ship turns.