Inability to see the field with the value in textbox

I have autocomplete PDF-form, in which there are different fields. On each page, I have a textbox that displays the number (no matter what). On the first page the number is displayed correctly, but the rest it UNdisplayable and starts only appear when you click on that textbox.

In what could be the problem? Please tell me.

P.S. I use PDF Clawn library to fill my PDF-form programmatically. And I use Adobe Acrobat XI v. 11.0.0 to read&edit it.