This has been in the game since last generation and is completely wrong. I figured you guys finally fixed it, as I didnt pick up the game last night but alas, no.
You have currently Iowa fans chanting 'EYE- OH - WA' we never chant like that.
After scores we chant 'I - O - W - A' with each quadrant of the stadium chanting one letter and making a gesture with their arms to match the letter. This goes on pretty much until the next kickoff.
I believe it starts with 'I' in the student section, but im not sure about that, havent been to a game in a while.
This video shows it perfectly