When I modify the original file in Draw and export again, the new file is not fillable.

When I export a fillable file in Draw the file works in pdf readers. When I modify the original file in Draw and export again, the new file is not fillable. I follow exactly the same export procedure. Any suggestions or explanations?

EDIT_ebot Taken from the question box, question shortened.


I follow the same procedure for export, that is, export as, and make sure the pdf form box is checked. I have LibreOffice 7.0.4.2 and MAC OS 11.2.2

The same procedure for file exporting yields different results, even if I rename the file.

Any suggestions?
Thanks

Please shorten the title to a few words only and put the explanantion into details. Thanks in advance…

In which file format do you save your original file?

Please upload two sample files here with the “before”/“after” states.

What are you exporting it as?

I export it as PDF. I do not know if I save it.