Safari not rendering website correctly

Hi, i am saif khan, i'm facing a problem with my iPhone 7+ safari browser. I have my own website Swaggie Status and i am facing problem with Safari Mobile browser only that my website is not rendering correctly but it renders/working perfectly fine in other web browser such as: Chrome, MicroSoft Edge, and Safari For windows desktop.

For Example: I have implemented a function in my website called One Tap "Copy To Clipboard" and whenever anybody tries to copy something from my website using One Tap "Copy To Clipboard" function browsing from Mobile Safari it suddenly jumps to very bottom of the page and some CSS Styles also not showing correctly.

I am wondering why this is happening only in Mobile safari, i am loosing my iPhone visitors.

- Please help me Fixing this problem.

-Thank you in advance.