@Altair8800 I think we all are wanting to know more about this issue. Is it something that could allow an attack using the router or is is it something that has been or currently under attack. This...

@Norske Per TP LInk Web site -- While TP-Link's Deco, Archer Router, and Omada EAP all support Mesh functionality individually, they are not designed to work together to form a single Mesh network....

@Norske When I am saying "matching router for Mesh" that is the same Mesh type as the EAP625 which happens to be the small business Omada series of products. Just review TP LInk's Omada products...

@Norske Check out EAP625 if you can connect by ethernet and use it as an AP. Or consider getting a matching router for mesh. edit... note there are other options like this.

@wildwings Select almost any wifi router works as it is the printer that makes it hard to attach to the network.

@thosport As a test, connect your pc direct to the modem and then run your ping test. If you still get dropouts, then look at the modem or ISP. If good, put the router back in and the test with wifi...