FS#3321 - wireless phy, capable of bands g and a but set as AP to band g (2.4 GHz) still doing radar scan

[openwrt-bot]

wwortel:

OpenWrt SNAPSHOT, r14382+7-ad0f0df909
Ubiquiti Routerstation ar71xx with 3 pcs. PCIe 2.4/5 GHz radio
wlan0 set AP 5 GHz
wlan1,2 set as AP 2.4 GHz

from dmesg:
daemon.notice hostapd: wlan2: DFS-CAC-COMPLETED success=1 freq=5640 ht_enabled=1 chan_offset=-1 chan_width=2 cf1=5630 cf2=0
daemon.warn hostapd: current_mode != IEEE80211A
daemon.notice hostapd: wlan1: DFS-CAC-COMPLETED success=1 freq=5640 ht_enabled=1 chan_offset=-1 chan_width=2 cf1=5630 cf2=0
daemon.warn hostapd: current_mode != IEEE80211A

When set to 2.4 GHz band no radar scan on 5 GHz band should be done but apparently it is being done. As the radio circuit cannot do G and A band service at the same time
this interferes with continuous service in the 80211 G band.
No idea where this 5630 GHz frequency stems from that the log shows. wlan1 is set to channel 12 and wlan2 to channel 1. Being AP they are not supposed to scan, let alone on 5 GHz.
iwinfo:
wlan0 ESSID: "some a"
Access Point: 00:0C:42:xxxxxx
Mode: Master Channel: 128 (5.640 GHz)
Tx-Power: 18 dBm Link Quality: 70/70
Signal: -29 dBm Noise: -95 dBm
Bit Rate: 81.0 MBit/s
Encryption: WPA PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11abgn
Hardware: 168C:0029 168C:4204 [Generic MAC80211]
TX power offset: unknown
Frequency offset: unknown
Supports VAPs: yes PHY name: phy0

wlan1 ESSID: "some b"
Access Point: 00:1B:B1:xxxxxx
Mode: Master Channel: 12 (2.467 GHz)
Tx-Power: 18 dBm Link Quality: unknown/70
Signal: unknown Noise: -95 dBm
Bit Rate: unknown
Encryption: WPA PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11abgn
Hardware: 168C:0029 168C:2096 [Generic MAC80211]
TX power offset: unknown
Frequency offset: unknown
Supports VAPs: yes PHY name: phy1

wlan2 ESSID: "some c"
Access Point: 00:0C:42:xxxxxx
Mode: Master Channel: 1 (2.412 GHz)
Tx-Power: 16 dBm Link Quality: unknown/70
Signal: unknown Noise: -95 dBm
Bit Rate: unknown
Encryption: WPA PSK (CCMP)
Type: nl80211 HW Mode(s): 802.11abgn
Hardware: 168C:0029 168C:4204 [Generic MAC80211]
TX power offset: unknown
Frequency offset: unknown
Supports VAPs: yes PHY name: phy2