I tried breeding bees and bringing them to hives, and they would not enter despite having pollen, it being night, and even raining. Instead of entering the hives, they seem to just wander around aimlessly but tend to stay around ~10 blocks of where I un-lead them. One of the offspring, however, actually ended up getting stuck in the air about 12ish blocks up. Animations are still present but that is all. The bee is just hovering in place, while the other is just wandering.

When approaching the stuck bee (and the wandering bee) with a flower, it will become un-stuck, but still will not enter the hive and continues to wander. However, it appears one of the bees get stuck again after a few minutes (I'm not sure if it is the same bee getting stuck or a different one... my bad for not paying close enough attention)... Again, about 12 blocks in the air, but in a different spot (x,z).

This is how to reproduce it:

1. Find a naturally generated nest.
2. Breed two bees from the nest
3. Lead the offspring and attach them to a fence post nearby
4. Run ~100 blocks away and set up hives
5. Go back to the offspring and lead them to the hive

Pictures

831 - Bee is stuck in the air, not moving from it's position; bees are not entering the hives, despite having pollen, it being night, and raining

832 - Both the stuck and wandering bee react to flower, and the stuck bee is not longer stuck

834 - Both bees continue to wander after no longer holding a flower

835 - One bee gets stuck again after a few minutes preceding letting go of the flower (834)

UPDATE: 836 - After further waiting, both bees have now become stuck.

UPDATE 2: 837 - One spontaneously became un-stuck a while later, but still not entering hive

UPDATE 3: 838 - After a while, both bees are now stuck and have not become unstuck for quite a while