I purchased an Archer A7 to provide wifi in a computer lab environment specifically for 20 Wyze smart plugs.  The router is not used for any other devices.  There are only a couple of other wifi networks for this lab, but they can't be used by the plugs because they require web site login (and I don't manage them).

At first, it seemed to be working fine, but now over time, the smart plugs seem to keep losing their wifi connection to the router and not automatically resetting and re-establishing the connection (which I think is a Wyze issue, not TP-Link), requiring manual unplugging and re-plugging (which is complicated by a global pandemic where the whole idea of the smart plugs was to not have to go into the remotely accessed computer lab).

But I'm not sure why they're losing their connection to the router in the first place.  These are 2.4GHz only devices, so I started with the default router settings.  I've made a number of wireless settings changes, none of which have improved anything at all.  I tried disabling the smart switching between 2.4 and 5 GHz.  Then I completely disabled the 5 GHz network.  Then I forced the wifi channel to each of the non-overlapping channels 1, 6, and 11.  No improvement.  The plugs will not maintain the connection.

I starting thinking that maybe it was interference and the plugs were too close together.  Separating them did nothing either.

I'm using a hidden SSID if that makes any difference.

At this point, I can only assume there's a problem with the router and that either I need to try a different setting or it simply won't work with this type of setup and that I need a different router.

Any ideas or suggestions?