Wildly inaccurate accents
I'm a little ways into Banquet for the Damned by Adam Neville and enjoying it so far, but I had to stop and get this off my chest. There's a (minor, as far as I can tell) character who's supposed to be an old money Boston Brahmin, who's studying abroad in Scotland and understands multiple ancient languages. The text specifically notes that his accent gives him away as old money. But the narrator, Luke R Francis, makes him sound like one of the toughs from Guys & Dolls. Francis is Scottish so I can't fault him too much for not knowing the nuances of different Northeastern US accents, but it's so hilariously incongruous.
Have you ever had a narrator be so off with an accent that it took you out of it?