Starting off with the bugs, as those are more important. (I play on the android version)
First bug is harmless, but I still wanted to bring it to your attention. After building the shrine to Falas (I think that was the name) during Deas' story, I was exploring a bit and noticed two spots on the cliff don't have any collision.
As for the second bug, it does have an impact on gameplay, but it's far from game breaking. During combat on the world map, after unlocking and filling all the unit slots, one unit is glitched and unusable.
Third bug is that Lind's event never triggered, even after defeating the bandits numerous times, but she shows up in my CG room and her CGs are still locked.
Final bug that I've run into is concerning Lace. I originally went with her good path, as I would LOVE the opportunity to make her a party member, but I wanted to go back and do the bad path as well, just to unlock the CGs. I went to the book in Ryens room and used the option to reset Laces events, but it doesn't work.
And finally on to the question. I read the walkthrough on how to do it, but during Dea's story, after getting the fullbody CG, and having her reunite with Mia, I can never find the headmaiden at the shrine to finish up her story. I've seen and talked to both Tabbris and Sophia, but I don't know of either one is the actual headmaiden. Is she not at the shrine, is it also bugged? I thank you in advance for your reply.