Quick update. I filed a support ticket and they got back to me within a couple hours. They suggested I remove the knob cap and try pressing the shaft directly. Sure enough, that worked. Then after replacing the knob shaft, the knob itself is working as expected, all good!   Perhaps the knob was pushed too far down on the shaft not leaving enough travel to engage the switch when pushed? In any case, its working now.   Like I said, I am very impressed with the Helix ecosystem :
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