How to edit a submitted form

I have a jot form that will come to my email after the first part has been filled out (by the client).  On the submission that comes to me, I have an "Edit Submission" tab.  When I click on the tab, the submission form open and I can type in a code that unlocks the rest of the form for me to complete.  However, when I do this, my part of the form is not saved.  How do I edit a submission so that the edited version of the form is saved?

I have made a test submission on your form: https://www.jotform.com/62985982295173

After that, I tried to edit the form submission, via this url: https://www.jotform.com/edit/353278002461905167 .(You will receive, this Edit submission link in email notification of form submission, that is the same which you mentioned in the screenshot).

And I was able to update the form submission without any issue:

I would suggest you to clear Browser's cache, or try to check it in different Browser.

If you still face issue, or need further assistance, feel free to revert back.

Thank you!