Groundwire unregisters

I've got a recent issue, I swear we had no issues in the past, but I've had a client recently complaint about Groundwire dropping the registration when the app is not in foreground:

Removed contact 'sip:201@devicepublicIP:7580;rinstance=2EFE164D;x-ast-orig-host=192.168.5.32:7580' from AOR '201' due to request
== Contact 201/sip:201@devicepublicIP:7580;rinstance=2EFE164D;x-ast-orig-host=192.168.5.32:7580 has been deleted

Assume groundwire did an update of some sort that messed this up?