Either select all the text form fields in the document or the individual form field you need to fix.

Background colours can be set on an individual text field or multiple text fields at once.How to apply a background colour to a PDF form field To fix the issue try applying a background colour to the form fields – for example a white background colour. Preview appears to be corrupting the PDF, saving the form information but not displaying it correctly. The issue appears to stem from Apple Mac users completing the form using the ‘Preview’ application – which allows Mac computers to open PDF documents without Adobe Reader being installed. This mysterious issue has been reported for several years without a fix from Adobe, however there does appear to be a workaround if you have the Adobe Acrobat software. When you click on the form fields the text appears, when you click away the text is hidden again. People are completing the form, saving the information and sending it back – however when you open the document the form fields appear empty. You’ve got a PDF with form fields enabled.