I am curious about this. I have devices on my home network that I can't connect to with my phone unless I disable the VPN client in the phone when I try to connect to those devices. Once I have connected, I can turn the VPN client in the phone back on and it works fine. It's my understanding that part of a VPN function to interfere with ISP surveillance capability is to encrypt all traffic between the device running VPN client and the VPN servers, so I suspect the encryption is causing the initial connection problem. I don't understand why it works once I connect and then turn the VPN client back on. Maybe the VPN client preserves existing unencrypted connections.