The app constantly shut off and disconnects the VPN and I have to go into the app and stop and restart the program.
Sorry for the late response. This usually happens due to "Battery Saving" applications which shut down background services (in this case the VPN service). Check whether you have any Battery saving apps, or battery saving from your OS and try white listing Block This.
Also I would add Incase anyone else has this issue, that HTC added a new app to nougat update called "Boost+" and it can regulate apps in foreground and background. Open the app, then background, find the apps you want to be left alone, tap the app, then the third choice is "off". I'm not entirely sure if this is in addition to battery optimization, but whitelist the app there also.