After updating to BDS 1.19, my bees have disappeared from my crafted be hives, I don’t hear any noises from the hives either, I have a natural hive near by that has 2 bees hovering by the entrance and the never move unless I use a lead to pull them away, when I take the lead off they go back to the same place, no other bees are leaving the nest.
I also had a crafted hive with 2 bees in it with a sign on it to stop them leaving, that is also no longer buzzing and no bees leave when I removed the sign.