sechel: I quoted tosfos who quotes a navi in the time of rishonim
I must have missed where you quoted that Tosfos. Could you please recite the source?
Or are you perhaps referring to Gitting 68a where Tosfos quotes הר”ר עזרא הנביא? If that’s the case, then I believe you have it wrong as I don’t believe that Tosfos means that he was actually a navi. Rather, that that’s the way he was referred to.
Google עזרא הנביא ממונקנטור and in the Hebrew wikipedia you’ll find a number of explanations for his name, none of which say he was an actual navi.