In Two Bone IK node, Joint Target Location values are exposed on node when it isn't in Details panel

When placing a Two Bone IK node in the Anim Graph, the Joint Target Location input will be exposed on the node, even though, by default, Join Target Location Space is set to Component Space. Join Target Location will only be available if it's set to Bone Space or Parent Bone Space.

1. Launch UE4Editor.exe QAGame.
2. Open any animation blueprint.
3. In the Anim Graph, add a Two Bone IK node.

RESULT:

Joint Target Location is exposed on the node, but is not in the Details panel (since the default Joint Target Space is Component Space).