Have you tried power cycling your router?
Assuming this is the printer. It looks like it has both wired and wireless networking. Does it work over wired ethernet or does that fail as well?
Maybe the printer is trying to connect to a dead host? Do you have DNS logs besides blocked requests? How about capturing the traffic and figuring out what the printer is trying to connect to?
After I printed a thing I was able to reconnect wireless about five-six hours later.
Thanks for all your suggestions! My working theory is that either the electronics are dying or a connectivity issue, that the device is trying to connect to an update server or whatever.
The former would be a poor show for a device with just 500h of usage, and the latter would be really really bad programming. Either way, it's a problem with a relatively easy workaround!
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