On Day 63 I finished talking to the nobles and had the markers placed for me to go talk to Istinia and Arzagos. However they have not spawned yet in game, and do not appear as notables in the settlement overview. Additionally, there is no option to enter their homes. It is now day 75 and they still haven't spawned yet.
The only noticeable thing I spent that could've caused this apart from being a new patch is that Epicrotea was under siege, had a rebellion, and was eventually captured while I had the quest active to go talk to her.
The only noticeable thing I spent that could've caused this apart from being a new patch is that Epicrotea was under siege, had a rebellion, and was eventually captured while I had the quest active to go talk to her.