I find that my Z-Wave network occasionally becomes sluggish and sometimes looses sensor events.
Nothing shows up in the debug logs.
When that happens, I fire up my Z-Wave sniffer and looks for talkative nodes. Just the other day it was my Fibaro RGBW controller spewing out messages to a non existing node address. Power cycling the Fibaro node made it shut up and things were back to normal.
I have also experienced this with Heatit ZTRM2 and Aeotec Multisensor 6.
