Haven't gotten similar issues. That's really weird. Maybe some settings on the router would affect? If you only change the wireless settings on C5400 and don't connect other devices to it, will it...

Does the guest network have the same SSID with main networks? Maybe you can try turn it off and check again. Also does this happen on all the devices using 5G? How about try to disable smart connect...

Have you tried to use Torrent download on a PC, not to the HD? Also have you tried to connect PC to your modem/ISP directly and try to download torrent? It might be an ISP-related issue. On the...

You may contact them by email to check. I think they would check it out and find a solution for you even though there isn't one.

Got it, but as far as I know, there is no such info. Maybe you can send TP-Link Tech Support a feedback so they can consider it.

You need to use the DDNS function on your router together with the virtual server/port forwarding function. For the virtual server/port forwarding function, you can assign different external port...