Lossing anonymous user input data problem after preview page returns back to the data submission form

[jamesdrupal9]

I am trying to write a cypress test case about a submission form for the anonymous user.
The test case runs 4 steps below. It fails at the step 4 because all input data in the submission form is gone after the anonymous user finishes the preview page in Cypress . Do you know how to keep the user input data in the submission form?

Step 1) Input data into all fields of a submission form as an anonymous user

Step 2) Click the preview button to preview the data in the preview page

Step 3) Click the "back edit link" button in the preview page

Step 4) Check the existing data in the submission form

All existing user input fields are empty in the submission form.

I have tested the same test case in Behat automated tool, which is able to keep the user data.
Could you please advise how i should do in Cypress?