Bas Kol goes against Halacha

 There is a common phrase that is used to imply that a particular view is the halacha by stating that it is as if a Bas Kol has announced that it is the correct view

The Chasam Sofer(Toras Moshe Tzave page 65) points out a major problem in that in most cases describing the halacha and Bas Kol, the Bas Kol is against normative halacha.