Hi Timothy,
Thank you for using using Essential PDF.
The methods for checking the presence of form fields has been implemented in our library, recently. Could you please report the issue through Direct Trac Developer Support System
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents so that we can provide you the necessary solution.
Please let us know if you have any questions.
Regards,
Pravin Joshua D