Hi,
I'm using 19.07.8 on an Archer C7 v2.
My devices on the network don't see each other, i.e. I have a similar issues as described here and here.
However the workaround described by Jow in the first link re adding the multicast_to_unicast option doesn't work for me either. I'm applying it like this in /etc/config/wireless
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option key 'password'
option encryption 'psk2'
option ssid 'mynetwork'
option multicast_to_unicast '0'
Should also say that I only just got started with openwrt, so I'm quite confident that I'm missing something...
Thanks heaps for your help!