Yeah of course. Started the quest with the Nun, where she hands you a vial to go get pure water, so you can later perform an exorcism. Also started the quest with the Bunny where she wants you to get Water, Soil and Gauno. Decided to tackle them together at the same time. Went to the cave with the water, there were two interactable spots, highlighted with blue arrows, right next to eachother. I touched each interactable location, and sped through the text here, assuming one was for the holy water, and the other for the farming. I then went and finished the bunnies quest, making the soil, allowing me to invite her to the village. On another day, I went to try and turn in the water for the nun, and was unable to.
In my attempt to fix this, I returned to the mountain, and checked all cave locations with water, and made sure I had not missed it. I also returned with an empty vial bought from the shop to make sure that wasnt causing the issue. I also checked a guide here on F95 to identify if I was looking in the incorrect place, but I read that it was in the mountains on roughly the 2nd plateau on the east side, which is where I had thought I had collected it originally.
Perhaps I am just missing the location completely, or the text I sped through had some vital information about the water in the cave being incorrect and telling me to go somewhere else, in that case, I would feel incredibly silly and I apologize for wasting your time.. But as it stands now, the quest log simply tells me to get the water from the mountain.
I referred to it as the "Affection 3 quest" Because it is acquired after handing them their two (+2) unique gifts, and then talking to them (+1) after doing so. "The Excorcism of Emily" and "The Secret Formula" Might be the names.
Thank you for the quick reply, hope this clears things up!