It's simply a bug or an exploit in the game that allows you to not take fall damage when you fall on a sweet berry bush. For example if you fall on the ground it will take you some hearts but if you fall on a sweet berry bush instead it doesn't take you any hearts.
I hope this was helpful !
Linked issues
Comments 2
Thank you for your report!
We're actually already tracking this issue in MC-149990, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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.
Please do not mark unreleased versions as affected.
You don't have access to them yet.