Recent activity full of "HomeSeer Technologies Firmware unknown"

I just got a SmartThings hub and also bought a
HomeSeer HS-WS100+ light switch. I’m using Darwin’s device handler v1.01. The switch is working just fine.

Except the “Recently” tab for the device is full of “Office Lights firmware version is Homeseer Technologies Firmware unknown” repeating every 6 minutes.

Not a big deal, but it makes it much harder to find useful information in the activity log. Any idea how to fix?