@Justin_Roy 

The Archer A5 v4 for your region looks to have the latest release build of 180313. Based on the build you currently have, you are running the latest firmware already.

With respect to the orange light, that is the router indicating the WAN port is no longer receiving the internet connection. It would be recommended to replace the Ethernet cable to see if that may be where the issue is happening.

If you happen to have another router, swap them and monitor to see if the internet still drops during the same time frame. If so, then you may have an issue with the modem, if not, then the issue may be the WAN port on the TP-Link router.