Just to add to something I noticed which may be useful for debugging the problem: Wireless speed decrease seems to mainly affect download. I get around 100-120mbps up, which is the same as when I'm...

@Jordan1996 I've also thought about downgrading from 1.5 to 1.4 but that doesn't seem to be possible from what I know and unfortunately I'm way past the return period on mine. 1.5.0 firmware has been...

I have a pair of Deco M4s which have been working excellent ever since I bought them over year and a half ago. While my main unit still works fine, ever since I updated the firmware to version 1.5.0...