PDF Form Drop Down Selection Showing Incorrectly / Submit Form Button

I have a created a PDF form which is to be mainly used & completed on an Apple IOS devices (iPads/iPhones). 

Once the user has completed the form, they press the "Submit Form" button which then sends me the completed form. 

When the user goes into their Mail app on their IOS device & opens the attachment (the PDF form) via their sent folder. The attachment (PDF form) displays the incorrect drop down value the user selected. It keeps reflecting the first option of the drop down menu even though they didn't select that. 

When i recieve the form & open it on a desktop computer it reflects the correct drop down selection. 

I understand IOS devices don't have the capability of displaying all form fields correctly & you need to use other PDF viewer apps to do so. However, if the user manually shares the PDF form to the Mail app (rather than using the "Submit Form" button), the drop down selection is reflected correctly on the IOS device. 

My question is - is there a way to use the sumbit form button but make it create a "copy" of the PDF form rather than include all the form properties? Is there any way around this? Javascript?

Any assistance would be greatly appreciated.