I have a system of 3 Deco M4s currently and I recently bought 2 more M4s to add to the system. However, the two new M4 have drastically slower speeds even when placed closer to the main router. On the app it shows the same IP address but it has a different MAC address than the other 3. Is there a way to fic this issue? I bought two more to reach the other ends of my house but they're just not working as well as the first 3. Also I dont know how to check the hardware version of the M4 so I just took the highest number ahahha,