As reported a while ago via the AR Discord (https://discordapp.com/channels/105462288051380224/976177730662039593/985534395228241930) adding any IK hand additive translation or rotation causes the preview to show that (probably through a bug) two items are created. One is at the desired pose, the other is in default. This did not show up in testing because for existing use cases no IK additives were used so the two items always perfectly overlayed. A fix was promised but has yet to arrive (https://discordapp.com/channels/105462288051380224/976177730662039593/985819329230688306) so I figured I make a ticket about it so it is not forgotten.