> When I'm in a game, my download will drop from 600+ down to 25mpbs
If the game-server is sending to you at 25 mbps, then that is what you get, in "bursts" of 600 mbps. Compare to receiving a tennis serve -- about once every 20 seconds, a tennis ball comes toward you, at over 100 miles per hou, in a "burst".
Or, compare to driving on a multi-lane highway late at night -- you still drive at the speed-limit, but there are empty lanes to your sides, and there is no vehicle behind you, for a long distance -- the highway can take much more traffic (in the other lanes, or closer behind you).
> it will disconnect me from my game.
Read what I wrote a while ago -- connect your game-box directly to the cable-modem, and play. If you still get disconnects, then, as the Shaw employee said, then the problem is "outside" of your home, and a Shaw technician can trouble-shoot. But, given COVID-19, the technician probably will not enter your home -- they can check the "demarcation-box" outside your home, and go up the telephone-pole, to check their network. Additionally, over the telephone, a Shaw employee can login to your cable-modem, and check its internal diagnostics.
