When a bee nest item with bees is destroyed, the bees inside it won't be released. However,the shulker box with items will release its all items when it is destroyed.
(See more details, watch this video. It was edited to reduce time.)
Steps to Reproduce: Place a bee nest, then summon some bees, as soon as they enter the nest, break the nest, it will become an item. Then throw it into lava (or the void or so on)
Results:The item is destroyed directly, the bees don't go out.
Expected Results: Like shulker box,the bees inside the nest go out as soon as the bee nest item is destroyed.