If 2 bees try to harvest pollen from the same flower at the same time, they will continually bump each other back and fly to the flower to try again. This will happen even when they are pushed. The only way to resolve this is to destroy the flower.
MC-159873
Bees having issue harvesting pollen from flower
Resolved
Duplicate
0
Thank you for your report!
We're actually already tracking this issue in MC-159679, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.