@Sunshine I already tried EVERYTHING possible, in every way. Made a network for every bundle of M4 (2 x 4) to update them properly then reseted everyone. Now I just realised that I have one bundle M4...

Hello, I have 3 deco M4 working "fine" since years. I bought 3 deco E4 to extend my network, they are working fine together on a new network, but when I add them into MY network compose of 3 M4, it...