Just today the printer dropped out again, but I cannot find a reason for it.
I assigned the printer to 192.168.1.120 in pfsense. When I type the ip address I get a printer settings page in the browser so I know I am communicating with the printer. However, when I try to print I get a network error in the print queue.
I'm still using the Netgear R6700v3, but as a wireless access point only. I'll try turning it off and using only the Unifi Lite AP instead.
EDIT:
I since pulled my R6700v3 even as an access point, connected the printer to the Unifi Lite, then removed and reinstalled the printer drivers. Printing is back. I'm pretty sure all my printer issues originated from the R6700v3.