Text field entries not showing all text after Fill&Sign complete

Ok, that is too easy. 

You don't need Fill & Sign if you create fillable text form fields. 

The users will only need Fill& Sign on their end to just apply their electronic signatures.

Just make sure that you haven't been saving the file with a signature applied on it  becuase it'll make the entire document read-only.

You may, however, make sure that the Acrobat PDF source file that you've created  is saved using the Save As Other--More Tools--Reader Extended (and protect content editing with password optionally) . This will allow the document to be opened in Acrobat Reader and allow the users to just fill, sign, print, comment and save.

If you need to send this PDF to several users to collect their signatures, and some of them will be filling and signing the PDF form with the Acrobat Reader Mobile app,  Use the Adobe Sign tool preferably to establish the appropriate filling and signing workflow.

With the Adobe Sign tool you can add the signing recipients to your document using their respective emails, select data blocks and signature blocks for each recipient,  and accomodate such signature blocks where you need each signer to sign on a specific area on each page.

With this method the user(s)  should not be able to mess around with the editing of your original file but will be able to Fill the form and then apply their siganture on their designated signature block.