  We show that the process of non-instantaneous reheating during the
post-inflationary period can have a sizable impact on the charged lepton Yukawa
equilibration temperature in the early Universe. This suggests relooking the
effects of lepton flavors in the leptogenesis scenario where the production and
decay of right-handed neutrinos take place within this prolonged era of
reheating. We find this observation has the potential to shift the flavor
regime(s) of leptogenesis compared to the standard thermal scenario.
