Try to update your laptop wireless driver to the latest one and see if that helps.

@martinlhzy You can file a feature request/suggestion/idea for TP-Link here.

That's good to know information.

Yes, use one of the other 3 LAN (only) ports to do that.

1) No - Can't make OneMesh between routers. 2) No - OneMesh is not supported in AP mode. Read about OneMesh here and here. If you have pfSense already, then you need only APs in your network. The...

@lpine You should be able to use MR400 as AP if you configure like in this reference. Connect main router LAN port to MR400 LAN port (Not WAN). Choose Router mode operation. Set LAN IP address in the...