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Fixed in 1.0.0-pre.2



Found in [Package]


Issue ID




[XR Interaction Toolkit] Adding an XRGrabInteractable to Game object in Play mode does not work

Package: XR Interaction


How to reproduce:
1. Open attached project ("")
2. Open SampleScene scene
3. Enter Play mode
4. Pick up the cube with the right controller
5. Release cube
6. Pick up the cube with the right controller

Expected result: Cube is picked up
Actual result: Cube stays on the ground

Reproducible with: 2019.3.9f1 (0.9.3), 2020.1.0b5 (0.9.4), 2020.2.0a7 (0.9.4)
Could not test with: 2017.4.39f1 (Packages are not present), 2018.4.20f1 (No XR Interaction package)

- Tested with Oculus Rift

  1. Resolution Note (fix version 1.0.0-pre.2):

    The problem was caused by the project adding a Grab Interactable component to a parent GameObject that shares Colliders with the child Grab Interactable. However, the initial child Interactable would only unregister from the Interaction Manager during OnDestroy, which is invoked later after the Destroy call. When the new Grab Interactable was registered with the Interaction Manager, its Colliders list conflicted with the still registered child Interactable.

    With changes made with 1.0.0-pre.2, the Interactable will unregister during OnDisable, which is invoked immediately. The new Interactable is thus able to associate the Collider with it.

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