@B.Will Thank you so much! This worked!

@B.Will Yes, in the switch box closer to the light, there was a white wire already connected to the switch. I labeled it as neutral because of the colour. There is also a separate bundle of white...

Hello, I have tried installing two HS210 switches to replace two "dumb" 3-way switches controlling the same ceiling light. As per the subject the HS210's start rapidly switching on and off as soon as...