Let's say you were in the sukkah on the first day of Sukkos, outside Israel, and said לישב בסוכה. You have not interrupted your stay in the sukkah. Now it's the second night. Do you say the bracha again?
My assumption was that you do make a new bracha. From the point of view of sefeika deyoma, yesterday was not Sukkos and there was no mitzva to sit in the sukkah. I would have thought that this bracha is no different from kiddush, or shehecheyanu, or על אכילת מצה on the second night of Pesach.
However, R' Moshe Feinstein OC 4:101 (at the end of the answer to the first question) takes for granted that you do not make a new bracha at kiddush if you've been in the sukkah continuously. At first I thought maybe he was talking about Shabbos Chol Hamoed, but he explicitly says he's talking about the second night of Yom Tov. The point comes up tangentially to the main topic of the teshuva and so he doesn't elaborate on his reasoning.
Does anyone address my argument (either to explain why it's wrong or to disagree with R' Moshe)?