I have a very similar problem here.
main router ax11000 and nodes (ac5300, rt-ac88u, rt-ac86u) all wired and up to date.
I have around 68 total devices connected to the system. Where 24 of them are sonoffs smart plugs (2.4Ghz) , the m5 ones. There is...
Thats good news, my ax11000 firmware was outdated. I have just updated and at least in the living room where I have a GT-AC5300 everything seems fine now. I will soon be testing with the RT-AC86U and 88U that are located in different rooms. And if I ...