Greetings,
Things I would confirrm/change:
Use separate SSID names for 2.4Ghz/5Ghz networks on your wireless router (if dual or tri-band and using the same name for all broadcasts)
Assign the printer a static IP on your network. Something that doesn't change. Don't make it a "moving target" and leave things to chance.
After doing the above the printer should remain connected to the 2.4Ghz broadcast and and be discoverable by its static IP consistently. This means you can PING it (from command prompt or terminal window), and/or open a browser and view its webserver by entering its IP address.
If it fails to remain connected possible causes:
Too far from wireless broadcast
Hardware issue with printer or its radio
If other devices remain connected, that would again point to the printer. The printer retains settings, even after power loss or failure, so you should not have to re-enter network settings over and over, even after power cycle or loss.
~Rick
Bay Area - CA
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