Ahh, yeah ok - this could be related to what @snell talks about above. Good news is I think we were able to fix this and as mentioned, there is a firmware patch that should improve the disconnects.
Using the Firmware Updater: [RELEASE] Z-Wave Firmware Updater
Flash this file onto the switch: http://files.inovelli.com/firmware/LZW36/Beta/LZW36_1.34.gbl
Hopefully this fixes things for you. Sorry for the troubles - it was a real rollercoaster getting to the bottom of this one.
Edit: good catch @jerias.mitchell - just updated it!