I have a Deco M4, and it was working properly for the last few years. However, just about a month ago, my internet on the Deco seems to have slowed down. Normally, I would get around 100 mbps if I'm connected to the Deco network, but now I can only get to 3 mbps if I'm lucky; most of the time, it doesn't even reach mbps but only kbps. I already swapped around the Decos, replaced the LAN cable, and even checked if it was a problem with the ISP. When I connected my laptop to my ISP router, I got around 600 mbps, but when I connected it to the Deco, I got around 5 mbps. I already tried everything, including resetting all of my Decos to factory reset, but to no avail.