Sorry for facing this issue, it's my pleasure to help us.
Welcome to the Shopify community!
and Thanks for your Good question.
Please share your site URL,
So I will check and provide a solution here.
sorry for that what do you mean do you need help or not?
thanks for confirm
how can i check this issue?
this is issue show if user login or doesn't login?
So.... just found a solution, sadly doesn't explain why it happens but works
After a few more hours found the padding for the top on the main content, changed from 30 to 130 and it works. don't know if this is a pre-set from the Theme but it was there.
@KetanKumar Thanks for the time you took to try to help, is much appreciated.