Steps to Reproduce
Context of the situation :
1. Make a new character.
2. Clear the Hunt in the following order : Mother Treek - Enigmox - Owlitzer.
3. Put the third heartstone into Wellspring after having a conversation with Flitt.
4. After putting the third heartstone return and talk to him again.
5. The missing message comes out.
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.