I'm using gpt-5-mini and it's doing weird things like explicitly saying "equals sign" and "slash" when referring to numbers. Eg.. instead of 150 grams of protein per day it'll say

150 "g" protein "slash" day

. Any ideas what's happening here? There's nothing in my system prompt that should be causing this.. Although i do have newline characrers in the ystem. prompt wonder if those could be causing this behavior? This is suppoesd to be solved with voice formatting, no? https://docs.vapi.ai/assistants/voice-formatting-plan