Hi 1009130, please access your profile and update your handle to something more personal.
It appears that something on your form is doing what you think it should. Have you tried just rebuilding the report and form from the create page wizard for a Form on a Table with Report?
If that is not an option, typically on the Form page there is a process that clears the page cache after the DML process is successful. Take a look for a process like that, see where it is firing if at all.
Unfortunately I can't recreate the form, But let me explain further.
This page has two regions, the form region and the report region, and when you select a record from the report region, the form region allows for editing. I tried with the aforementioned process but to no avail.
Thanks for lending me a hand