Update: Fixed. The issue was improper install. The switches were installed in the same box with 8 common wires (white) connected with a single wire nut. The wire nut was rated for 5 wires max and...

I have 3 switches, 2 are HS210 and one is HS200. They have been installed and working for months. Yesterday one of the HS210 started blicking the lights continuously. This morning a second HS210 and...