Resolving dead internet connection on laptop with screen off

Hello, I've got an odd problem that I have been unable to resolve for months. I have my laptop connected to an external monitor if that makes any difference. I've noticed that if I leave my laptop on but idle for a number of hours with the screen off, that the internet connection is dead until I move the mouse or press a button on my keyboard. This happens even if I have a CMD window open downloading a video stream using something like FFMPEG. It also happens even if I have script running on Ubuntu via WSL2. Annoyingly, it does not always occur which makes it harder to pinpoint.

I have checked to see if networking is enabled with Modern Standby, which it is. I've tried disabling all power saving features that I know of on my ethernet adapter, which hasn't helped. I have noticed that at times, it almost seems like my ethernet adapter has turned itself off when this issue happens? I don't know how accurate the "duration" time is in Advanced Network Settings, but typically when this issue occurs, the time will reset itself to 0.

I've gone through event viewer and noted the exact time when the issue happened today. It is at the same time as a bunch of "Entering Modern Standby" entries. At this point I'm pretty lost and would love some ideas. It is frustrating knowing that it could always happen when I've gone to work or gone to bed. Sleep is set to Never whilst turn display off is set to 5 minutes. My laptop is connected to AC power at all times.

Welcome to the forum. Is this what you did?.... open device manager. Expand 'Network adapters', right click on your wireless adapter (or ethernet adapter if you use wired internet) Select properties, select power management tab, uncheck "allow computer to turn off
this device to save power." OK
Also look in bios to make sure there is no setting relating to network that is turning off its power.

If that doesn't work, try hibernate instead of S0.

By the way, make sure you are using the latest UEFI bios version. Also check for graphics driver update.