Confirm AC1200G+ Guest network "access intranet" possible vulnerability (2.4GHz)

[synchron]

Hi,

Anyone can confirm that setting "access intranet" disabled for Guest Network on AC1200G+ is not working (2.4GHz)?
It is possible to see all other devices on the network. This doesn't happen with 5GHz Guest network.

Stock Firmware: 3.0.0.4.382_50624
Mode: Wireless router mode (Default) - It's NOT in AP mode

Same ebtables rules (created automatically):

Bridge table: filter

Bridge chain: INPUT, entries: 0, policy: ACCEPT

Bridge chain: FORWARD, entries: 4, policy: ACCEPT
-i wl0.1 -j DROP
-o wl0.1 -j DROP
-i wl1.1 -j DROP
-o wl1.1 -j DROP

Bridge chain: OUTPUT, entries: 0, policy: ACCEPT

Bridge table: broute

Bridge chain: BROUTING, entries: 6, policy: ACCEPT
-p IPv4 -i wl0.1 --ip-dst 192.168.2.1 --ip-proto icmp -j ACCEPT
-p IPv4 -i wl0.1 --ip-dst 192.168.2.0/24 --ip-proto icmp -j DROP
-p IPv4 -i wl0.1 --ip-dst 192.168.2.0/24 --ip-proto tcp -j DROP
-p IPv4 -i wl1.1 --ip-dst 192.168.2.1 --ip-proto icmp -j ACCEPT
-p IPv4 -i wl1.1 --ip-dst 192.168.2.0/24 --ip-proto icmp -j DROP
-p IPv4 -i wl1.1 --ip-dst 192.168.2.0/24 --ip-proto tcp -j DROP

Rules seem to be working for wl1.1 (5Ghz) but having no effect for wl0.1 ((2.4GHz)

I would really appreciate if anyone can confirm this. Thank you.