I've been having this issue for the last 3 weeks (or so) and I have no idea how to fix.
During the day (and some times night) the speed drops and my latency goes from stable circa 35-40ms to over 200ms across all my games (CSGO, Overwatch, PUBG). Even if I close all other programs other than the game to relieve the network, that does nothing.
I've reset my router multiple times, I've let it "cool off" for a day, I've went through my whole PC software to see if there was anything causing an issue, but nothing.
Other times, it works as intended but mostly late in the evening/night.
When I tried to call earlier through to support, my call got cut off at 40min mark so now I have to call and wait again...
My VM is M350 and I've never had this problem since the install (around 2 years ago).
Please help, this is driving me absolutely insane.