PDF with fillable form show Invisible text

[Kasidej5E6D]

I'm recently having trouble with many Windows users unable to see text inside PDF with fillable form fields.

In my case, we're having problem with Thai language. The value is in the field, but turned invisible. We're able

to copy the value.

Been digging through some old thread with this similar issues, and tried out some of the solutions, but still not working.
Here are what I've tried

- double check the font color that it's not White color

- original file was created by InDesign, so I've tried created a new PDF with forms

- only happened with Android, and Windows

- open the file with Adobe Reader instead of PDF Viewer by browser. cannot see anything unless click the field, or clear form button.

What I haven't preferred as solutions

- edit registry through regedit

- only force users to use Adobe Reader

So what is the problem or what did I miss here? Or is this just a normal scenario where PDF with fillable form can only

be editted and saved by Adobe Reader only?

[try67]

The file (or the fields in it) have been corrupted. I can't even export the form data to an FDF file, in order to import it back in, which usually fixes this kind of issue.

[Kasidej5E6D]

@try67 I've already tried creating a new PDF file with a few of simple text fields, but same thing happened.

[try67]

How are you adding the fields? What application are you using to fill it in?

[Kasidej5E6D]

@try67 Adobe Reader DC -> add text fields

[try67]

Not possible. Reader does not have this function.

[Kasidej5E6D]

@try67 How can it be? Have a look from my attached image.

[Bernd Alheit]

This is a screenshot of Adobe Acrobat, not Acrobat Reader!

[Kasidej5E6D]

Apology I meant Adobe Acrobat 😞

[try67]

And where/how are you filling it in?