Assigning MIDI Controller knobs to smart controls doesn't work (when tracks are in a track stack)

Is this happening for anyone else?

Steps:

1) New Logic Project

2) Create a few Software Instrument Tracks

3) Assign an external MIDI controller to one of the Smart Controls for one of the Instrument Tracks

4) Make sure the external MIDI controller is controlling the Smart Control as expected

5) add all Software Instrument Tracks to a Track Stack

6) external MIDI controller stops working as expected for the track with an external MIDI controller assigned to a Smart Control

Just building a big template to take advantage of MIDI FX+Smart Controls. Lack of ability to use track stacks is a drag.