The Bug:

When pathfinding to a flower, sometimes they will try to pathfind through slabs to access them, resulting in them being stuck. However, with 23w33a letting bees pollinate spore blossoms now, this can happen even more often and even through full blocks, where they will try to spin even but can't reach the spore blossom.

If above a slab, they will spin and actually be able to pollinate the spore blossom under it as well, but not if on a full block. I noticed this bug most often happening in uneven places with both walls and ceilings.

The behavior of this bug can best be observed in this video:
BeeSporeblossom.mp4