Setting up the Epson L222 as a network scanner

Are you using relayd? Or some other method?
Running services such as p910nd and saned on a device with relayd is not necessarily going to produce reliable results -- relayd is a bit of a hack and may have odd behaviors when combined with other services.

If you're unable to connect currently, I'd recommend that you use failsafe mode and dump your current configuration for review.

After entering failsafe mode...

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall