Strange loss of internet on wifi only, and not on guest wifi, with a 901ND
Archer A7 with the November 2020 firmware. Attached to a cable modem (motorola) with Cox service, both main and guest networks active. 5G and 2.4 only on the main network, 2.4 only on the guest network.
There is a TP_Link WA-901ND configured as a client to connect a Lorex 4k security DVR to the main wifi network, and a Roku TV also connected wireless to the main network.
Generally things work fine, but every few days the 901ND keeps the network connection but no other clients on the main wifi network can connect to the internet. Wired can connect, and the guest network connects. And you can connect to the main wifi and look at the router status, and it thinks there is no internet connection. Rebooting the router has no effect, but turning off the 901ND returns everything to normal. The 901 also has the latest firmware available as of 11/2020.
This is a very odd problem, any ideas?