Odd issue with printer after switch to new WAP hardware

Here are some configs. FWIW, I was running option multicast_to_unicast '0' as a temporary measure for testing this issue this morning. It's not my daily driver setting:

Wireless Config

config wifi-device 'radio0'
	option type 'mac80211'
	option path 'platform/soc/18000000.wifi'
	option band '2g'
	option htmode 'HT20'
	option country 'US'
	option cell_density '0'
	option log_level '1'
	option channel '6'
	option txpower '27'
	option noscan '0'

config wifi-device 'radio1'
	option type 'mac80211'
	option path 'platform/soc/18000000.wifi+1'
	option band '5g'
	option country 'US'
	option cell_density '0'
	option he_bss_color '25'
	option htmode 'HE80'
	option log_level '1'
	option channel '40'
	option txpower '14'

config wifi-iface 'wifinet1'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option key '<redacted>'
	option dtim_period '3'
	option ieee80211r '1'
	option ft_over_ds '0'
	option reassociation_deadline '20000'
	option ieee80211k '1'
	option time_advertisement '2'
	option wnm_sleep_mode '1'
	option bss_transition '1'
	option encryption 'sae'
	option max_inactivity '15'
	option ssid '<redacted>'
	option mbo '1'
	option time_zone 'EST5EDT,M3.2.0,M11.1.0'
	option wnm_sleep_mode_no_keys '1'
	option proxy_arp '1'
	option ieee80211w '2'
	option na_mcast_to_ucast '1'
	option pmk_r1_push '0'
	option ft_psk_generate_local '0'
	option isolate '0'
	option multicast_to_unicast '0'

config wifi-iface 'wifinet2'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option key '<redacted>'
	option dtim_period '3'
	option ssid '<redacted>'
	option ieee80211r '1'
	option ft_over_ds '0'
	option reassociation_deadline '20000'
	option ieee80211k '1'
	option time_advertisement '2'
	option wnm_sleep_mode '1'
	option bss_transition '1'
	option encryption 'sae'
	option max_inactivity '15'
	option mbo '1'
	option time_zone 'EST5EDT,M3.2.0,M11.1.0'
	option wnm_sleep_mode_no_keys '1'
	option proxy_arp '1'
	option ieee80211w '2'
	option na_mcast_to_ucast '1'
	option pmk_r1_push '0'
	option ft_psk_generate_local '0'
	option isolate '0'
	option multicast_to_unicast '0'

config wifi-iface 'wifinet3'
	option device 'radio0'
	option network 'GUEST'
	option mode 'ap'
	option key '<redacted>'
	option dtim_period '3'
	option ieee80211r '1'
	option ft_over_ds '0'
	option reassociation_deadline '20000'
	option ieee80211k '1'
	option time_advertisement '2'
	option wnm_sleep_mode '1'
	option bss_transition '1'
	option encryption 'sae'
	option max_inactivity '15'
	option ssid '<redacted>'
	option mbo '1'
	option time_zone 'EST5EDT,M3.2.0,M11.1.0'
	option wnm_sleep_mode_no_keys '1'
	option proxy_arp '1'
	option ieee80211w '2'
	option na_mcast_to_ucast '1'
	option pmk_r1_push '0'
	option ft_psk_generate_local '0'
	option isolate '0'
	option multicast_to_unicast '0'

config wifi-iface 'wifinet4'
	option device 'radio1'
	option network 'GUEST'
	option mode 'ap'
	option key '<redacted>'
	option dtim_period '3'
	option ssid '<redacted>'
	option ieee80211r '1'
	option ft_over_ds '0'
	option reassociation_deadline '20000'
	option ieee80211k '1'
	option time_advertisement '2'
	option wnm_sleep_mode '1'
	option bss_transition '1'
	option encryption 'sae'
	option max_inactivity '15'
	option mbo '1'
	option time_zone 'EST5EDT,M3.2.0,M11.1.0'
	option wnm_sleep_mode_no_keys '1'
	option proxy_arp '1'
	option ieee80211w '2'
	option na_mcast_to_ucast '1'
	option pmk_r1_push '0'
	option ft_psk_generate_local '0'
	option isolate '0'
	option multicast_to_unicast '0'

config wifi-iface 'wifinet5'
	option device 'radio0'
	option mode 'ap'
	option ssid '<redacted>'
	option key '<redacted>'
	option dtim_period '3'
	option ieee80211r '1'
	option ft_over_ds '0'
	option ft_psk_generate_local '1'
	option network 'IOT'
	option reassociation_deadline '20000'
	option ieee80211k '1'
	option time_advertisement '2'
	option wnm_sleep_mode '1'
	option bss_transition '1'
	option encryption 'psk2+ccmp'
	option max_inactivity '15'
	option mbo '0'
	option time_zone 'EST5EDT,M3.2.0,M11.1.0'
	option ieee80211w '0'
	option wnm_sleep_mode_no_keys '1'
	option proxy_arp '1'
	option na_mcast_to_ucast '1'
	option pmk_r1_push '1'
	option isolate '0'
	option multicast_to_unicast '0'
Network Config
config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option packet_steering '1'

config device
	option name 'br-lan'
	option type 'bridge'
	option igmp_snooping '1'
	option ipv6 '0'
	list ports 'eth1'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'
	list ports 'lan5'

config interface 'lan'
	option proto 'static'
	option netmask '255.255.255.0'
	option ipaddr '192.168.45.25'
	option gateway '192.168.45.5'
	list dns '192.168.45.5'
	list dns_search 'home.arpa'
	option delegate '0'
	option device 'br-lan.1'
	option force_link 'yes'

config interface 'GUEST'
	option proto 'static'
	option device 'br-lan.9'
	option ipaddr '192.168.9.25'
	option netmask '255.255.255.0'
	option force_link 'yes'

config interface 'IOT'
	option proto 'static'
	option device 'br-lan.99'
	option ipaddr '192.168.99.25'
	option netmask '255.255.255.0'
	option force_link 'yes'

config interface 'LAN6'
	option proto 'dhcpv6'
	option reqprefix 'no'
	option device 'br-lan.1'
	option reqaddress 'try'
	option delegate '0'

config bridge-vlan
	option device 'br-lan'
	option vlan '1'
	list ports 'eth1:u*'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'

config bridge-vlan
	option device 'br-lan'
	option vlan '9'
	list ports 'eth1:t'

config bridge-vlan
	option device 'br-lan'
	option vlan '99'
	list ports 'eth1:t'
	list ports 'lan4'
	list ports 'lan5'
Sys Parameters
# for f in $(find . -name hairpin_mode -o -name multicast_to_unicast -o -name isolate_mode); do echo $f; cat $f; done
./kernel/debug/ieee80211/phy1/netdev:phy1-ap1/multicast_to_unicast
0x0
./kernel/debug/ieee80211/phy1/netdev:phy1-ap0/multicast_to_unicast
0x0
./kernel/debug/ieee80211/phy0/netdev:phy0-ap2/multicast_to_unicast
0x0
./kernel/debug/ieee80211/phy0/netdev:phy0-ap1/multicast_to_unicast
0x0
./kernel/debug/ieee80211/phy0/netdev:phy0-ap0/multicast_to_unicast
0x0
./devices/platform/soc/18000000.wifi/net/phy0-ap0/brport/multicast_to_unicast
1
./devices/platform/soc/18000000.wifi/net/phy0-ap0/brport/hairpin_mode
1
./devices/platform/soc/18000000.wifi/net/phy1-ap0/brport/multicast_to_unicast
1
./devices/platform/soc/18000000.wifi/net/phy1-ap0/brport/hairpin_mode
1
./devices/platform/soc/18000000.wifi/net/phy0-ap1/brport/multicast_to_unicast
1
./devices/platform/soc/18000000.wifi/net/phy0-ap1/brport/hairpin_mode
1
./devices/platform/soc/18000000.wifi/net/phy1-ap1/brport/multicast_to_unicast
1
./devices/platform/soc/18000000.wifi/net/phy1-ap1/brport/hairpin_mode
1
./devices/platform/soc/18000000.wifi/net/phy0-ap2/brport/multicast_to_unicast
1
./devices/platform/soc/18000000.wifi/net/phy0-ap2/brport/hairpin_mode
1
./devices/platform/soc/15100000.ethernet/net/eth1/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/net/eth1/brport/hairpin_mode
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan4/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan4/brport/hairpin_mode
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan2/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan2/brport/hairpin_mode
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan5/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan5/brport/hairpin_mode
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan3/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan3/brport/hairpin_mode
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan1/brport/multicast_to_unicast
0
./devices/platform/soc/15100000.ethernet/mdio_bus/mdio-bus/mdio-bus:1f/net/lan1/brport/hairpin_mode
0