Why aren't parts of this custom rig moving during animation in-game only?

[Nogalo]

Greetings,

External Media

book and anims.rbxm (56.3 KB)

Here is the video and assets showing my issue

I made a custom rig with the intent of having it play a few animations, however, when i play the animations in game, parts of the rig don’t move during the animation despite everything seemingly set up correctly. nothing i’ve done made the book open except manually coding the motor6d C0 connecting the pages
I’ve tried

• that parts aren’t anchored
• that the motor6ds are properly connected(i successfuly made the book open by tweening the motor6ds)
• i’ve removed everything from the model that wasn’t necessary, except the parts that move, and still the book pages wouldn’t open
• i created a different test anim, no change
• i tried changing how the parts are connected

If you have any ideas i would really appreciate the advice, thank you for your time

[Nogalo]

To anyone who might have this issue in the future, turns out the problem was the hierarchy of rig parts. After I parented the the core (part that actually holds the book and connects the 2 pages) inside the humanoid root part, everything started moving as expected