Describe the bug
Holding a grove sprite of any kind with two hands and exiting the world makes it crash repeatedly upon rejoining.

To Reproduce
Steps to reproduce the behavior:

1. Shift right click on a grove sprite with both hands empty
2. Save and exit
3. Attempt to open the world again to find it crashing

Expected behavior
Being able to load the save

Screenshots

Info (please complete the following information):

• Modpack Version: 2.77.5
• Server or Singleplayer: Singleplayer
• Version the world was created on: 2.77.5

Additional context
The crash screen says Name Pain, Primitive Mobs, and Carry On are the culprits.

Can someone try to reproduce this on our dev build please

Unable to repro on dev

And anyway, it's fixed in dev.