What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If the user are using the same computer browser and the cache or cookies hasn't been clear yet, then the previous entered value will appear in a suggestion drop down.
I'm not sure if this is what you need but you can actually prepopulate the form field using the URL parameter. Here's a guide: Prepopulating-fields-to-your-JotForm-via-URL-parameters . You can also use this app: http://prepopulate.jotform.io/
If you want to populate value from one form field to another then you need to use the conditions. Please check this guide: How-to-Populate-Field-with-a-Value-from-another-Field
If this is not what you need, let us know. Also, please provide more information about your issue. Thank you.