It's Marv Allen in chapters 1-2 and then it reverts to system narrator in chapter 3. I don't know whether this happens in other places since I have not listened extensively to it.
Good catch [:)] I can confirm the issue on Logos 5.1 SR2 (for Mac)
I can confirm too (Mac)
It happens on Windows 7 x64 too.
FYI, it does NOT happen on my iPad with Vyrso. We get Marv Allen, all day, all the time [:D]
It is happening here in the 242. Windows 7 64 Bit.