The Ui (for legacy models) isnt working on mobile browser

I like 5.1 but due to it being very restrictive atm I want other models to choose from until I can use 5.1 properly. Obvious solution ik is to log into the app. I dislike the look of the way the app looks. But i will if there is no viable solution to fix this in the browser. I've logged out and back in again exited and cleared history. Ik it might just be on OpenAI’s end I just wanna write without the model spazzing out.