How can I get the data to stay in the form for the next use!

I have enabled the 'Continue Forms Later' setting, this worked for few weeks, and now no longer works.

It is still working when I tried your form here.

I suggest you clear your browser's cache and cookies and try it again. The issue might have something to do with your browser's cache since this feature uses browser's cache/local storage.

You can also try this alternative method if the above feature does not work for you.

https://www.jotform.com/features/save-and-continue/