Dept. of Quirky - Duct Duct Weird

Observed this odd behavior when attempting to add a riser to an existing lateral duct run. If you create the riser during the initial sketch of the lateral run it works fine. It just gets weird if you try to introduce a riser later. It works fine if you just create a riser separately. Also curious is that sketching a duct will cease the duct run when you click on a reference plane. If you expect to continue sketching duct you need to be careful not to click on a reference plane because the current duct sketching mode with stop and you'll have to select the first point again to continue. Both conditions are quirky in my book. Video embedded below and posted at OpEd Videos and YouTube.