Indeed, according to his words, an explanation is needed in the opinion of the Rema, who wrote (Orach Chayim, Siman Tav Tet, Se'if Zayin): "And it seems to me, if one did not drink a third or fourth cup at the festive meal, there is no need to go back and drink at the meal, as there is a concern that it may appear as adding to the cups. But for the first two cups, one should go back and drink without a blessing. And similarly, with eating the matzah. Ideally, one should lean throughout the entire meal." Here, from the outset of his words, it is clear that he holds like the opinion of the Rashba, that if one did not eat matzah at the meal, one should go back and eat at the meal, and from the conclusion of his words, it implies that he follows the Rambam's opinion, that the obligation of the festive meal applies to the entire meal, and if so, it is not a specific condition for fulfilling the mitzvah of matzah, but rather it complements it as per the words of the Gra. Therefore, according to the Rema, one should ideally lean throughout the entire meal.

Furthermore, the very style of the Rema needs clarification, as he deviates from what the Rambam wrote regarding other aspects of eating and drinking at the meal – if one leans, it is praiseworthy, and it implies that there is no absolute obligation to lean for the rest of the meal, as he concluded his words: "And if not, it is not necessary." Indeed, from the phrasing of the Rema and "ideally, one should lean throughout the entire meal," it implies that ideally there is an obligation to lean, although it is not obligatory, and the source of this obligation needs clarification. The Peri Chadash pointed out this issue, how this obligation is derived as an ideal, and there is only a mitzvah from the finest. The very need to lean for the rest of the meal requires clarification, as according to the words of the Gra, the obligation to lean according to the opinion of the Rashba, which the Rema follows in his approach, is part of fulfilling the mitzvah of matzah and the cups, and not a separate matter in itself.