Reader extended pdf with "more tools" enabled becomes a "Read-only" file

I verified that my fillable pdf is saved as a Reader Extended pdf using the "enable more tools" option. I also verified in finder after saving the Reader Extended pdf the file is not "read-only." I opened the pdf in Acrobat Pro on my Mac and then, using the "Share" feature, sent the form to my alternate email address. Next, on my iPad I opened the pdf in Acrobat Reader DC. However, when I attempt to "Fill & Sign" I receive a "Read-only document" message that says "This tool is not available because the document is read-only." If I then save a copy of the pdf from my iPad to my computer, when I check the document properties it is now set as read-only, which happened without my interaction and defeats one of the primary purposes of Acrobat's "Share" feature. How can I stop the read-only property from being affixed to Shared pdf files?