[HELP] AP isolation not working

Installing and Using OpenWrt
1 
config wifi-device 'radio0'
	option legacy_rates '0'
	option type 'mac80211'
	option hwmode '11a'
	option noscan '0'
	option ht_coex '0'
	option shortgi '1'
	option block '0'
	option path 'platform/ar934x_wmac'
	option macaddr '20:0d:b0:93:XX:XX'
	option nasid '200DB093XXXX'
	option country '00'
	option ht_capab 'SHORT-GI-20 SHORT-GI-40 RX-STBC1 DSSS_CCK-40'
	option channel '196'
	option htmode 'HT20'
	option distance '500'
	option txpower_level '500'
	option txpower '18'

config wifi-iface
	option wps_pushbutton '0'
	option disassoc_low_ack '1'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option ifname 'wlan0'
	option hidden '0'
	option wmm '1'
	option wds '1'
	option disabled '0'
	option maxassoc '256'
	option ieee80211r '0'
	option mobility_domain '4096'
	option wpa_group_rekey '0'
	option macaddr '20:0d:b0:93:XX:XX'
	option nasid '200DB093XXXX'
	option encryption 'psk2'
	option key 'Pta011653'
	option wpa_pair_rekey '0'
	option wpa_master_rekey '0'
	option ssid 'TEST'
	**option isolate '1'**

The device is a Comfast 312A. With a custom firmware based on Openwrt.
I have tried using isolate but it does not seem to work.

I can still ping other devices connected to the same AP.

2

Your post does not appear to be related to an officially released OpenWrt version, package or supported operation.

It is unlikely that you will receive useful input here.

Please seek advise from the relevant maintainer.