Survey doesn’t submit on iPhone but submits on iPad and desktop

[GeomaticsAecon]

Portal 10.9.1, published from connect, returns these errors when submitting from the iPhone.  iPhone is up to date at software version 15.5.  
tested on android and it sends on android. 

[RobertBorchert]

Check to see if VPN is disabled on the iPhone.  it should be disabled or turned off