Update form with multiple pages

I have a form with multiple pages. In the local area when I develop an application operates all OK.
When I test form on shared hosting is behaving very strangely.

No matter which side of entering the data and use the “Update” and save the form, the form is always placed on the first page. This is very, very disturbing.

So always I fall at the beginning and I have to choose the side on which I want to continue.

Does anyone have experience with how to fix this?

Thanks in advance.
rik