Avahi daemon interferes with Apple’s HomeKit
Thanks to this Reddit post
I can confirm that the Avahi daemon interferes with HomeKit communication, somehow. With it turned on, it creates a lot of ping chatter between the different devices on my network.
I don’t myself know enough about how the daemon operates or what the HomeKit communication protocol does with Zeroconf to have an answer for why this happens.
@dominikhoffmann I can confirm that this is true for me as well. Extremely disappointing. Any other options besides Avahi for MDNS across subnets on PFSense?
As an alternative, I'd recommend trying
Hope this helps.