Steps to reproduce:

1. Import and load the attached .mcpack (will be attached soon, currently you can only create resource pack with i.e. animation with a particle in locator) in a world.
2. Play animation.example.particle via playanimation command to attach particle to locator (currently you will need to create your animation with attached particle and create locator in the model).
3. Try using hud command to see the difference between visible paperdoll and hidden.
4. Play animation after changing visibility of the paperdoll.

Observed results:

Two particles appear in the locator with a visible paperdoll. One particle appears when the paperdoll is hidden.

Expected results:

Only one particle appear in the locator with a visible paperdoll. One particle appears when the paperdoll is hidden.