Scanning vs channel list

Installing and Using OpenWrt Network and Wireless Configuration
1

On the 5GHz band I have been using a channel option to skip some known bad channels (recurring radar activity and so on) in my previous place:

config wifi-device 'radio1'
        option type 'mac80211'
        option band '5g'
        option hwmode '11a'
        option path 'platform/soc/a800000.wifi'
        option htmode 'VHT80'
        option country 'DE'
        option txpower '13'
        option beacon_int '100'
        option cell_density '0'
        option channel 'auto'
#       option channels '52 132 149 165 36 100 116'

Rebuilding the setup from scratch on 22.03.3, to clear accumulated unused packages, I noticed that the scanning function would scan all channels at first (without the option above) and later only those selected (with the option enabled).

I half expected this keyword to influence the selection of usable channel but to have no effect on the scanning. Have I misunderstood the docs?

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