Sorry for the delay in response.
As you have mentioned above, the text disappears when you fill out the cells in the PDF and move to the next field.
It seems to be the PDF-specific issue.
Please check the properties applied to those form fields/cells in the PDF.
The properties applied to each cell is the same or different? That may be the reason for the disappearing of the text.
Would it be possible for you to share the document?
Without checking the document it is hard to say the reason behind the issue.
You can share the document either here in the forum reply or in a private message.
To initiate a private message, take help of the steps mentioned here How Do I Send Private Message
You can share the PDF using the steps provided in this help link How to share a file using Adobe Document Cloud.
We will be waiting for your response.
Let us know if you need any help.
HERE IS THE REQUESTED DOC.
We do not find any document or link to document provided in the last reply.
Please use the steps provided here How to share a file using Adobe Document Cloud to share the document.
Let us know if you experience any issue.