Bees don't sting the player

What I expected to happen was:

After I hit a bee, it hits me 

What actually happened was:

 The bee doesn't hit me, but just push me

Steps to reproduce

*1.*Create a world in 1.14.4

*2.*Save and Quit

*3.*Open the same world with the snapshot 19w34a

*4.*Spawn some bees in creative

*5.*Switch in survival mode

*6.*Hit the bees

*7.*And there is the bug

I hope that you can fix this bug. Thank you!