Since updating to 19w46a, the bees are trapped in their hives, and the hives produce no honey.  New hives work for a while, and then start to fail just like pre-existing hives. Every 30 seconds, during the day, the bees seem to try to pop out, but go right back in.  There is also a splash sound, like the hive is producing honey, but it doesn't.  I'll attach a screen capture showing the bees piping out and back in: CrazyHives.mp4

Shears have no effect on these hives.

Nests don't appear to have this problem, nor do brand new hives (for a while).