The event at the end of Chapter 21 has been changed so that Deen will not be lost even if Linoan is captured and goes on to the extra mission.
Previously, Deen would always leave Leif's Army when Linoan disappeared. This is not as much of a problem in other chapters, but in Chapter 21, he becomes the one who abandons and goes away even though he knows that Linoan has been captured. This change is intended to ensure that Deen does not abandon Linoan.