Kevin Brown begins:
Out of the several textual variants present in Jude 5, there is one which stands out as a significant variant with quite a significant impact on the text. I am, of course, talking about whether the subject of απωλεσεν is κυριος or Ιησους.
For the entire post see Who Saved the People Out of Egypt: Ιησους or κυριος | Diglotting.
Here are some of the scholars referenced in the text and footnotes: Jarl Fossum, Richard Bauckham, Bruce Metzger, and Bart Ehrman.