Ignore suspend on laptop lid close Ubuntu Server 20.04

I can't get the SSH connection to stay live when I close the lid of my laptop. I'm running Ubuntu 20.04 on a Dell Latitude E6420 and connect to it from Win10 with PuTTY.

I've already tried turning this off by editing /etc/systemd/logind.conf:

#HandleSuspendKey=ignore
#HandleHibernateKey=ignore
#HandleLidSwitch=ignore
#HandleLidSwitchExternalPower=ignore
#HandleLidSwitchDocked=ignore

(Initially I only changed the #HandleSuspendKey but when that didn't work after service restart I changed the others to see if that would change anything.)

I've also changed /etc/default/acpi-support to `SUSPEND_METHODS="none", but that didn't work.

I've even installed UPower and tried to add IgnoreLid=true, but that hasn't worked either.

This setting can't be turned off in the BIOS.

One thing I noticed is that when I initially setup the server it would disconnect from everything if I shut the lid, includig my router. However, once I edited logind.conf the server remained listed under the "wired devices" section of my router's login page. Could this mean that is has something to do with PuTTY or Windows (I don't have an Linux desktop to test this on right now)?