Questions are not visible in the PDF document in some cases

the PDF is almost fine (questions not visible in some cases)

I cannot replicate this problem on the PDF document of your form submissions. Would you mind sharing the ID of the submission where you notice that questions are not visible?

https://www.jotform.com/help/549-Where-to-Find-the-Submission-ID

We will check this further for you and start with that ID.

Note that the Hide Empty Fields option is enabled in the PDF settings. This option automatically hides fields that are not filled on the form on the PDF document. For example, on ID [REMOVED]. Field 8 is not visible because the table is not filled. 

It seems to be revolved now. Thank you.