Timeline resets controller links to None

[via5]

• Add a Person
• Select its head
• In the "Control" tab, set "Link to Atom" to A and "Link To" to hip (not hipControl)
• Add Timeline as a plugin
• Add headControl as a controller
• Play the animation

Selecting the Persons' head again shows that the link has been reset to None. This doesn't seem to happen when linking to Xcontrol instead of just X.

As a temporary fix, commenting out controller.RestorePreLinkState(); in FreeControllerAnimationTarget.GetLinkedRigidbody() fixes it, but I don't understand what it does or what I break by doing that.