Adobe Reader iPad does not save text input once I leave PDF

I have an iPad iOS ver 11.2.5 that I have been filling out PDF's for years using Adobe Reader by simply inserting a text box.  I then choose to share this item to a cloud service my work uses and I am now having issues.  I'll explain below.

I open the PDF file.  I insert my text I need to.  it shows up.  I then get done filling it out and when I export it to our cloud service (which we have been doing for years) it exports it as an HTML format.  And is not viewable. 

If I "back out" to check another form I filled out, then go back to the original PDF everything I input is missing.

Any advice anyone could give me would be appreciated.