Hi All,
If anyone is using the Archer VR900 I've just discovered possibly the most silly and annoying feature - theres a limit of 8 ports you are allowed to open on the router
I've got in touch with them and they are investigating at the moment, seems silly to limit the number of forwarded ports. I only spotted it because I added a new port forwarding rule yesterday, and then rebooted my Plex server and it would no longer add to the UPnP. I tried adding the rule manually and then it said limit reached!
Just in case anyone else experienced a similar problem - i'll update what I hear back