@isabellaversi The order of Recipients and the specific field assignment might be the issue especially with the default behavior on many DocuSign Accounts. If the fields are assigned to Recipient 4 but you are prefilling and setting to read-only then default behavior is that Recipient 1 through 3 do not see the data until the envelope completes, but any Recipient after Recipient 4 would see that field data. This is typically due to the following default Account behavior setting called “When an envelope is sent, write the initial value of the field for all recipients”. If this is disabled then this would be the behavior as described above. You will want to discuss this with your DocuSign Admin and have the Admin go to Settings > Sending Settings and enabled “When an envelope is sent, write the initial value of the field for all recipients”. This change would impact NEW envelopes only and not existing envelopes so you would need to void the original and create a new envelope to see i that changes the behavior.
Second possibility is that the field text was set to the same color as the document background so the text doesn’t show, example of using white text on a white background.