@WonTon79 I’m not an employee of GL iNet, but just a user of multiple AR300M and AR300M16 routers. I am not sure if you have searched through the forum, but there are a couple recent reports of connection issues with AR300M, including this one:
As you are using your AR300M16 for remote monitoring, and not as a travel router, you may want to test it with generic OpenWrt firmware instead of the GL iNet firmware, as this firmware is much more configurable for non-travel routers usage.
I use the AR300M as remote VPN servers, in location I do not have easy access to, and not as a travel routers. The OpenWrt version has worked better for me, as GI iNet adds a lot of changes to the OpenWrt firmware to make it a travel router, that sometimes gets in the way of using it for other purposes. There are also some tools within OpenWrt to be able to reboot the router if connection is lost to the remote system.