On the advice of Spectrum I recently upgraded my modem/router, even though I wasn't having any issues with the old one. The new one I got from them is a Technicolor TC8717T. I have an Epson XP-630 wireless printer, and now everytime I want to print I have to re-enter the wifi password. Never had this problem before and nothing else has changed.
My Hp printer use to lose it's wifi connection, when it went into power saving mode, until I reserved the ip of the printer in the router. That solved my issue.
Sorry. Guess I jumped the gun. Printer worked fine for 3 or 4 times yesterday, but today the same issue reappeared. Have to reenter the wifi password to get it to work. Has to be something to do with the new Spectrum modem/router. Has been working fine for years before the modem was replaced.
OK after further review it appears that my new Technicolor modem/router occasionally restarts on it's own. Not sure how frequently this happens but noticed yesterday that all the lights went out, then slowly came back on as it rebooted.
Seems my other devices reconnect automatically after this happens but the printer does not.
So it appears to be a modem/router issue rather than a printer issue.
Sorry I was not clear. A printer with Internet access, being blackbox, "passive" and most unattended, can be a security hazard in home network. So my rule of thumb, it can be in my Wifi network, receiving the print instructions from other devices in my LAN, but it does not need to connect to Internet - at least in theory. So, you can assign a static IP address to the printer from your router, and block its WAN connectivity by a custom firewall rule.
HP is known to block printing depending on your "ink subscription" (!) status: (https://www.howtogeek.com/403346/hps-ink-subscription-has-drm-that-disables-your-printer-cartridges/).
Let us know what happens next.