PDF forms: Why are text areas rendered as images instead of text?

See attached screenshot: While the actual form is rendered as text, and is actually fillable, text that I included as headers and additional descriptions is rendered as images instead of text, and thus printed at a low quality.

Is there anything I can do circumvent that behaviour?

Hello,

Normally this is the default behavior, when creating fillable PDF the Text and Header texts turn into images.

What you can do to is changing their color to something much darker to ensure the texts do not appear to blurry when printed. This is not a perfect solution but can gives you a better printing quality.

Thanks!