Fillable PDF fields becomes non-editable after saving

Question

Hello everyone,I created a fillable PDF form in Adobe Acrobat Pro that is used in our workshop. The staff opens the document in Adobe Reader, fill in some fields, and save it so they can continue working on it the next day.The problem:Sometimes when the file is saved in Adobe Reader, the document changes:none of the form fields are fillable anymorethe values that were already entered become non-editable (as if the document has been flattened)It seems like Adobe Reader is flattening the PDF during the save process, but I cannot find the cause.Can someone help me?

gifted_Meadowc5d2 · Answer

I’ve seen this happen when a PDF is saved or processed in a way that changes the form structure rather than simply saving the entered values. I’d check the form’s permissions and whether any security settings or document-signing workflow is being applied. It’s also worth testing the same file in Acrobat Reader with a fresh copy to see if the issue can be reproduced consistently. If it only happens with certain files, comparing their form properties may help identify what is causing the fields to become non-editable.

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