Bug XR Grab Interactable Instantaneous mode doesn't respect the attachment transform?

I'm using an attachment transform with the XR Grab Interactable. My expectation is that the grabbing attachment point for any interactor will always be at the attachment transform.



When the movement type is set to Velocity Tracking or Kinematic, I get the expected result:



However if I set the Movement Type to Instantaneous, the attachment transform is no longer respected and the attachment takes place at the transform of the object with the interactable component instead of the attachment transform. Which makes no sense to me and breaks my hand poses. Which is frustrating because this is the setting that I want.



Is this a bug or am I doing something wrong?

I'm using the 2020.2.0f1 and the 1.0.0-pre version of the toolkit with the oculus 1.7 plugin, but I've always seen this on every version and I've been waiting for it to get fixed, but now that it's almost 1.0.0 I'm wondering if it is intentional for some unknown reason.

 

It is a known bug, you can visit here for some work arounds while we wait for the fix:

https://forum.unity.com/threads/att...-movement-type-in-xrgrabinteractable.1028836/

 

https://issuetracker.unity3d.com/is...ed-when-movement-type-is-set-to-instantaneous