I have mikrotik hap AC2
I put my chromecast devices on separate wireless AP. each AP has it's own DHCP, subnet and separate bridge.
AP1 - has chromecast devices
AP2 - everything else
Unfortunately, although I am able to cast as long as my phone joins AP1, I cannot discover/cast from AP2.
I've enabled IGMP in both APs and I have forward accepted between the APs.
I can ping from AP2 to AP1 but not cast.
your help is appreciated