Bees Pathfinding not working propriety

There are three bugs that I have to discuss about the bees

 

1. Bees don't understand how to move around a large oak tree. Most of them will end up on top of the tree and they wont get down.
2. Bees will refuse to go into other hives that are empty, and they will all stay next to 2 hives, even if they are full.
3. When a bee tries to exit out of a hive, it will immediately enter back and it will do that in a loop.