Mobile Safari glitches scaled text when scrolling. Any ideas?

I'm not sure if anyone can help but I am creating a website for my boss. I'm 99% finished, however, I have noticed when I load up the site via iPhones Safari the text boxes which have been 'Scaled to Fill' glitch out and judder. I have opened the site up via the chrome app and it works fine. Desktop works fine. It seems to be interfering with the scroll? This is my first time using squarespace and have 0 web developing skills so any help would be greatly appreciated! Ideally would like to fix as I know the majority of users here in the UK use apple/safari. Thank you! I have included a video below of the issue. 

Site url: https://blue-oleander-fzfe.squarespace.com/

pass: Joy

Sounds like it might be a bug, have you reported it to Squarespace support? 
https://support.squarespace.com/hc/en-us/requests/new#choose-topic

Did you ever find  a solution? Im having the same issue. Thanks!