LZW31-SN Switch buzzing

Just finished installing my first LZW31-SN. I replaced an old GE Z-Wave switch. I noticed the new LZW31-SN switch itself buzzes at all levels while on. Is that normal?

Wired using neutral, there are 15+ LED bulbs on the wire (I have one light switch for my entire basement)

Besides the buzzing, I love the configurability and notifications!

The buzzing sound is not normal. Can you provide more detail on the lights themselves?