Disclaimer: I'm aware that having Opnsense box acting like switch (bridge ports) and AP in the same time is not liked scenario, but I'm on home envoironment with light load. So here I am... using Topton box with 3 LAN/bridged ports and Atheros n-Wifi card. 25.7.10 with almost default settings (Dnsmasq + unbound, no ipv6 or any strange config or plugins).
In big picture everything works as normal. Due to my room layout I need to have Chromecast audio connected to my Opnsense box Wifi. It works well and I can stream audio into it from my computer, media server (both connected via cable and another switch to Opnsense) and iPhone, when iPhone is connecting to my other AP on the other side of the house - same 192.168.1.x network, same SSID, channel 6. But when I approach my living room where Opnsense and Chromecast locate and iPhone jumps to Opnsense box channel 1, I can not see Chromecast anymore - basically they can not share same AP). All other services work - Roon, web browsing, email etc. I can see other devices on my network - printer, Opnsense webui, BESIDES BubbleUPnP server installed in my media server. It starts asking password (not set), which acc. to Bubble help means, that "I try to accsess it from another network". But I'm not - all devices in 192.168.1.xxx
If I walk into other AP, all good.
I have done the Bridge and Wifi (part of bridge) following to the letter the Opnsense guide. Nothing I can see here which could create such issue.
I read somewhere that doing Bridge setup wrong, could cause issues with Multicast. Could that be it ? What shall I look for there ?