VPN site to site Azure / drop subnet connection

I've got this exact same issue. If I run a ping -t between two devices on the subnet I want to keep alive, it never disconnects. I wish someone would fix this or tell us the command to change how this works because it needs to quit dropping subnets for not having enough traffic over it.

Could you create a route based VPN instead? This should be more stable. And you could create a gateway device, which comes with a keep alive option. 

Could you create a route based VPN instead? This should be more stable. And you could create a gateway device, which comes with a keep alive option. 

Went to go do this tonight and the xrfm interface never appeared. Figured I needed to reboot the router to fix something causing that, so I told it to go ahead and update the firmware from 18.0.4.506 to 18.0.5.586 since that would reboot it too and it rebooted and never came back up. This router is about 3 hours from me so I'm waiting for staff to arrive on site to help me troubleshoot it now -_- Not  happy guy right now.