Found a bug in Temple of the Forgotten God story step that seems to be blocking my progress through the story.
After clearing the first room in the Cathedral of Hidden Depths, the wiki states I should be able to interact with the Abaddon Shrine to spawn a Devoted of the Deeps. However, Sayeh al’Rajihd seems to be stuck in combat mode, as her dialogue still states ‘Time to fight, Commander.’
Interacting with the statue only brings up a description from Sayeh.