Support for Orvibo (Living Wise) dimmers?

I have a number of the Orvibo products: dimmer, switch, outlet.
From LivingWise.
The only issue that I've had with them is that I believe that they will fall off the zigbee mesh if the power is cut to them.
So, beware.
If you have your power cut, check these devices to ensure that they are still active.