Mages Guild: Delivery for Dagmund has a bug - delivery part can be accidentally skipped.

The topic the player needs to choose to complete the delivery is not obvious. Completing the delivery is hidden in "Icebreaker Keep" topic - this is totally counter intuitive, sounds more like a generic topic.

At this point, the player can pick the topic "gone missing" (can be unlocked in for example vanilla Moroni Uvelas quest). Then, the player gets a journal entry, which causes the delivery to be skipped, since the delivery and the missing apprentice are part of the same quest.

Also, if the "Icebreaker Keep" must be that delivery topic, make sure it appears in the journal entry.