When I save Dagmund's apprentice from being stuck in the rafters because of the levitation experiment failure, I go straight to the Firewatch MG guildhall. But the questgiver, Halan Macrinus, refuses to give me new duties, mentioning that I should save the girl first. Though, he shouldn't know about her.

Suggestion to change this dialogue of his to something like: "You say, there was an incident about a missing apprentice in Nivalis? Report to Dagmund when you investigate the matter."