I used the Basic->DHCP GUI to add static entries for two hosts and then examined what was written to /etc/dnsmasq/hosts/hosts, which in addition to showing entries for the router's LAN and WAN IPs, has:
192.168.0.230 fixed-wireless-modem<0 192.168.1.225 cctv1<1
Note the trailing "<0" and "<1" characters. They aren't seen in the GUI. Seems there is a bug when generating this file.
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