Multichannel device with new app

I have a GE multichannel Z-wave plug (28177-1) set up and working with the classic app using the “Z-Wave Light Switch Multichannel” device type. I can see and control both outlets with the classic app. With the new app I can see both outlets but only the main one is controllable. The CH2 (child) outlet is visible but won’t turn on or off. It just hangs like it’s trying but never works. I remember seeing someone ask what still isn’t working in the new app so here’s an example. Hopefully it can get fixed.