Invisibility: You can now choose to turn players invisible instead of invulnerable when they are playing pocket games. The following has been added to your settings.yml file.
Code (YAML):
Invulnerability:
setInvisibleInstead: false
As you can see it is located under the Invulnerability section.
Setting this to true will completely hide the player meaning the player is undamageable and the particle sphere won't spawn.