4800 Series Printer - Wakes up every Hour

I have had a 4800 series Canon printer for a number of years. It ordinarily 'sleeps' after 5 minutes, wakes for jobs when needed, no problems.

I recently replaced my Asus Router with a more robust Araknis Network and Switch.  The problem is that the printer now wakes from sleep every hour, around the clock, for no apparent reason.  Initially it was 1 minute after the hour, but now 2 minutes after the hour.  Like clock-work.

I have rechecked all relevant settings on the printer, and nothing seems wrong.

I have involved SnapAV, who make the Araknis gear, they have logged into my system, and can't see a reason for this either.

This is a well-maintained Windows 10 Pro Dell 630i Desktop computer.

Also, this occurred with regular DHCP.  I also configured both Router and Printer for a Static IP, but the hourly wake-up continues.

I'm hoping somebody can offer some insight, suggestions, or a way to fix this.  Can provide other info if needed.

Thanks.