R15 rigs occasionally dying when replacing body parts

[Maximum_ADHD]

Check out this thread. It might still be relevant.

Add a reliable method for swapping out R15 packages without killing the Humanoid

As a Roblox developer, it is currently incredibly painful to switch out R15 limbs, due to the peskiness of our friend the Humanoid. Whenever the neck joint is removed, the Humanoid’s dead state gets immediately triggered. While in the dead state, all joints are forcefully broken during every single physics step. So if you try to create new joints, they usually disappear before you can revive the Humanoid. Now you might think that we can work around this by using SetStateEnabled, but heres wher…