After first successful command, no response to state changes
I can successfully use homebridge-wol once, and then it will not respond until I restart homebridge. 

Hitting the switch successfully turns off the computer, but the switch in the Home app has a spinner for a bit, then shows the device as On but with an exclamation mark. If I hit the button, I can still change the status of the device in Home, but nothing happens.

Here's my relevant debug log:

> [11/1/2020, 11:30:44 AM] [Mike's PC] [NetworkDevice] Got user-triggered state change: 0
> [11/1/2020, 11:30:44 AM] [Mike's PC] [NetworkDevice] Shutdown cycle started
> [11/1/2020, 11:30:44 AM] [Mike's PC] [NetworkDevice] Device went from status "Online" to "ShuttingDown"
> [11/1/2020, 11:30:44 AM] [Mike's PC] [Pinger] Stopping pinger
> [11/1/2020, 11:30:44 AM] [Mike's PC] [NetworkDevice] Attempting to shut down the device using "ssh"
> [11/1/2020, 11:31:23 AM] [Mike's PC] [NetworkDevice] Got user-triggered state change: 0
> [11/1/2020, 11:31:25 AM] [Mike's PC] [NetworkDevice] Got user-triggered state change: 1
> [11/1/2020, 11:32:26 AM] [Mike's PC] [NetworkDevice] Got user-triggered state change: 0

You can see it shut down the computer, and you can see the triggers from me tapping the button in Home on and off afterwards, with no action taken from Homebridge.

This happens both on the stable and v5 beta release.