Yes, I've seen something similar - the switch reports that it's not forwarding traffic, but if you send a job to the device it does get printed, and you get a reply if you ping the device by IP address (although the first couple of packets are lost before you get a response). I swapped both printers and switch ports and the behaviour follows the specific device, but I did notice that it only happens when Xerox MFP devices are connected (HP/Canon devices are ok) I suspect that it's the copier going into Sleep/power saving mode and the switch stops forwarding traffic because it's not receiving the expected response from the printer. I tweaked the option to enter power saving mode after 1 hour (from memory I think the default was 15 minutes) but it's still happening, and I gave up researching after I couldn't find anything to confirm the above on Meraki/Xerox/google, etc Snip from this morning:
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