Broken "iw station dump"

I discovered "iw wlan0 station dump" does not output anything on LEDE r3640-f229f4a (its 1-2 weeks after 17.01)
I'm using WNDR 3800 with ath9k
Could you test this on other ath9k devices with recent LEDE ?
Can be bug after ath9 airtimes fairness patching or something similar

Works for me in LEDE master with WNDR3700:

root@OpenWrt2:~# cat /tmp/sysinfo/model ; grep REL /etc/os-release
NETGEAR WNDR3700
LEDE_RELEASE="LEDE Reboot SNAPSHOT r3887-17f60b1cd2"

root@xx:~# iw wlan0 station dump
Station 30:cd:..:..:..:5d (on wlan0)
        inactive time:  118190 ms
        rx bytes:       3835508
        rx packets:     9944
        tx bytes:       1784611

Are you talking about 17.01 branch? Will test with that later.

EDIT:
for ath10k based WRT3200ACM, both wlan0 and wlan1 produce dump.

I use self-compiled version from the snapshot I mentioned.
Source was downloaded with "git clone https://github.com/lede-project/source"

Yes, I also tested with wlan1. Its remote system and now only 5 ghz clients are up, so cant test right now on wlan0. I assumed its the same on wlan0 and wlan1 because they use the same driver. Could be wrong.
station dump on both wlan0 and wlan1 work fine on 1.5 years old openwrt on WNDR3700

My bad in the previous message (that I have already edited). I turned wifi down on my other routers and made sure that something is associated with both wlan0 and wlan1 in WNDR3700. Both produce then ok station dump of the devices that are attached to that radio.