From: Rabbi Akiva Eiger
To: Rabbi Simcha Bunim Ginz (Eiger)
Rabbi Akiva Eiger addresses his brother's intricate questions about why chametz pots must be broken on Pesach according to Rav, who holds nosein ta'am lifgam is forbidden, and the related difficulty regarding fish that came up in a meat dish. He ultimately rejects the Makor Chaim's analogy to serucha me'ikara, arguing that the absorbed flavor remains ra'ui lager and is therefore subject to the chametz prohibition when Pesach arrives, with the distinction lying in whether a prohibition ever attached to the substance.
Source: Shu"t Rabbi Akiva Eiger §183