[21.02.0-rc.4] Bug? Configured DTIM not respected


in LuCi, I've configured: DTIM = 1

I logged on the AP via SSH and ran.

iw dev wlan0 station dump

and saw, OpenWrt didn't respect this setting. I would have expected to return "DTIM = 1" but it says "DTIM = 2".

iw dev wlan0 station dump
Station XXXXXXXXXXX (on wlan0)
        inactive time:  4 ms
        rx bytes:       5395929
        rx packets:     38882
        tx bytes:       2066396
        tx packets:     4212
        tx retries:     955
        tx failed:      1
        rx drop misc:   22
        signal:         -81 [-85, -88, -84] dBm
        signal avg:     -75 [-83, -84, -82] dBm
        Toffset:        18446744050365792860 us
        tx bitrate:     175.5 MBit/s VHT-MCS 1 80MHz VHT-NSS 3
        tx duration:    649008 us
        rx bitrate:     195.0 MBit/s VHT-MCS 1 80MHz short GI VHT-NSS 3
        rx duration:    5141948 us
        last ack signal:-95 dBm
        avg ack signal: -92 dBm
        airtime weight: 256
        mesh llid:      0
        mesh plid:      0
        mesh plink:     ESTAB
        mesh airtime link metric: 46
        mesh connected to gate: no
        mesh connected to auth server:  no
        mesh local PS mode:     ACTIVE
        mesh peer PS mode:      ACTIVE
        mesh non-peer PS mode:  ACTIVE
        authorized:     yes
        authenticated:  yes
        associated:     yes
        preamble:       long
        WMM/WME:        yes
        MFP:            yes
        TDLS peer:      no
        DTIM period:    2
        beacon interval:100
        connected time: 1066 seconds
        associated at [boottime]:       23401.152s
        associated at:  1629795028192 ms
        current time:   1629796093252 ms

Can this please be fixed? Thank you.

Kind regards.

Hardware: TP-Link Archer C7v2|5