After further testing; it is indeed yet another bug tied to knocking her out during the raid.

Because she's a permanently hostile NPC during the raid; permanently hostile NPCs by default cannot be interacted with and she remains stuck in this non-interactable state all the way into ACT II (which only updates after she auto-initiates her dialogue by being rescued).

But because the 'share our strength' outcome does not auto-initiate her dialogue after combat, her state can never update through dialogue so she remains permanently non-interactable forever. So basically she's a friendly ACT II NPC with 'permanently hostile' state still being applied to her, which makes her non-interactable by default unless she manages to auto-initiate her dialogue.


UPDATE;

  • If she is knocked out at the Goblin Camp before killing Ragzlin she works perfectly fine since she remains a Neutral NPC
  • If she is knocked out at the Goblin Camp after killing Ragzlin she will again remain in her 'permanently hostile state' forever and also remain permanently stuck in Ketheric's throne room.