@Alex798 Could you try the VIU's example scene(ColliderEvent), whether you can reproduce the issue?
I just tried using Oculus Rift on ColliderEvent scene, and the object didn't release when my controller is out of sight.
Please try grabbing the non-sticky cube in ColliderEvent scene, thanks!
If you couldn't reproduce the issue in ColliderEvent scene, then I might need you to provide a sample project that can reproduce the issue for reference.
If you can reproduce the issue in ColliderEvent scene, I might also need you to provide the current project for further investigation.