I have had a TP-Link AC4000 Smart WiFi Router for a couple months. Have had intermitent issues at least a few times a week with wired connections to PCs and TVs going out. If I disconnect the network cable and switch to wifi on the devices, they do conect to internet. I have swapped out modems with cable company and even bought my own modem, but issue still happens so has to be the wired connections in the router. Any fixes for this?