Same issue as seen on PC version
This is buggy and confusing (nothing new under the sun, unfortunately) because mission can be finished (not completed of course) getting the egg, all the messages and the boat.
Someone suggested it's due to unlocked/undiscovered "campfire" or skipped cutscenes
But it seems it's not. Did it five times now, the last two times :
- I've unlocked all fires for sure, didn't used shortcuts, jumped down on the columns to reach the giants etc. ... no way
- Unlocked fires, no shortcuts and not cancelled any cutscenes ... no way
Now I've already enough of it, but my suspicion is that you have to kill all the enemies too ...
First time I went back to the cave, no egg and no bird in the nest and the ship was ready to flee.
Once unlocked the campfire the mission in fact reset itself, the bird (and the egg) were back to the nest.
I had no problem with my main toon, but I've ran the quest twice before the last patch.
Really annoying for a boring MOD that convinced some guildy to quit NW