Having VPN can for sure trip up some things, i fallen for that myself as a reasonably newcomer to VPN use.
I have reverted to not having it on all the time on the phone, not least since i am a avid phone hater, and dont really use it much, and just the short interaction to turn off the VPN ( or on for that matter ) is enough to PO me.
I keep my use to under 1 hour / mo for talking and only 1 - 2 GB of data, mostly reading news while on the can,,,,,, i very much look forward to ditching it again ( only have it for the sake of my dear old sick mother )
It could also be a recent IOS update, that seem to very often trip things up for the iphone using dashcammers, on the other hand i have a android 4 tablet which still work with newer APPs for cameras i have.
I will tag in the resident blueskysea expert.
@estore009 for his take on the situation.