@AMak are you using the OneMesh connection? Or did you just configure the device without activating the function?

  @AMak It may seem silly, but do it like this, I do it whenever I use mesh equipment, reset the repeaters, and do the configuration as I'm going to tell you now, do it one at a time and it next to the router, configure one by one, one at a time, configured the first, turn it off and on the second repeater and configure it, I also recommend using the Tether app for that, configured the second, then , you go and take them to the respective places they are now and test again, do that and tell me if it solves the problem, configuring the two connected is not cool until because it's not a single network, there are three networks and it may be that in the configuration you may be connecting it to the other repeater instead of connecting to the router, it seems silly to me but it has happened to me, I restarted the router and when everything went back to normal, the mesh was being made by the repeaters and not them connected to the main router and with that it was giving the same problem that you are having, another tip is try to separate the networks, turn off Smart Connect and also try with the 2.4GHz and 5GHz bands, each having its SSID .