To address FS3904 I think the MACs are required (still??), at least for me the following
/etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'soc/soc:pcie/pci0000:00/0000:00:01.0/0000:01:00.0'
option channel '36'
option band '5g'
option htmode 'VHT80'
option disabled '1'
option country 'CA'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option key 'aaaaaaaa'
option ssid 'TuTwo320'
option macaddr '...:b1'
option ieee80211w '2'
option encryption 'sae'
config wifi-iface 'x2_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option key 'aaaaaaaa'
option ssid 'TuTwo32x2'
option macaddr '...:b2'
option ieee80211w '2'
option encryption 'sae'
config wifi-device 'radio1'
option type 'mac80211'
option path 'soc/soc:pcie/pci0000:00/0000:00:02.0/0000:02:00.0'
option channel '1'
option band '2g'
option htmode 'HT20'
option disabled '1'
option country 'CA'
config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option key 'aaaaaaaa'
option ssid 'TuTu32'
option macaddr '...:b3'
option ieee80211w '2'
option encryption 'sae'
config wifi-iface 'x2_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option key 'aaaaaaaa'
option ssid 'TuTu32x2'
option macaddr '...:b4'
option ieee80211w '2'
option encryption 'sae'
config wifi-device 'radio2'
option type 'mac80211'
option path 'platform/soc/soc:internal-regs/f10d8000.sdhci/mmc_host/mmc0/mmc0:0001/mmc0:0001:1'
option channel '12'
option band '2g'
option htmode 'HT20'
option country 'CA'
option disabled '1'
config wifi-iface 'default_radio2'
option device 'radio2'
option network 'lan'
option mode 'ap'
option ssid 'Tu12'
option key 'aaaaaaaa'
option encryption 'psk2+ccmp'
option macaddr '...:b5'
brings up all radios without issue on a rango; I'm on master. Also check CC's are in agreement in your environs.