Website lags only on iPhone

Hi! I hope you’re well

I’m designing a website for a client that looks well on desktop, tablet, landscape and portraits.

But in portrait it lags from iPhone 11 to iPhone 13, here’s the video of what happens: WhatsApp Video 2022-08-14 at 10.02.58 AM.mp4 - Google Drive

I’ve tried to see this same issue in my iPhone SE and in 2 Android phones, and it doesn’t show this problem, so I don’t know what could be happening. I’ve had similar issues with this for another page, see here: Site looking different in the mac pro and chrome

Here’s my read-only link: https://preview.webflow.com/preview/cuperpay?utm_medium=preview_link&utm_source=designer&utm_content=cuperpay&preview=709d0aaff6015c4aa9f00d0506cd0c9a&pageId=62f90d8efdef233ff6b5eb4f&workflow=preview

I hope you can help me, please