Odd Issue with Hampton Bay Fan Controller

I have a Hampton Bay ZigBee Fan controller with KOF device handler installed. It originally paired as a Thing in ST, but I modified that to the KOF in the console and the child devices were created. In the Classic App on my android the status of the child devices is correct at all times. The RF remote works and using it will change fan speed that is reported properly in the App. However, the App will not let me change the fan or light and there is nothing recorded in the Recently tab. If I change the fan speed to light to on it works and I get the updated status in the app and a line in the Recently tab. I also have Alexa linked in with the Standard interface, not Ask Alexa, and while she responds OK, nothing happens and no record in Recently tab. I have already removed and repaired the device in ST several times with no joy. The device did work properly until about a month ago. Any suggestions -

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