Domoticz

I have the UZB1 on a windows pc. Whenever I reboot the pc or remove the stick and replace it, the routing is reset. It starts routing from scratch all over again. This actually results in dead nodes. i would have to restart domoticz server to eliminate the dead nodes. Is this normal?
Is it normal for the routing to be erased with the removal of the stick or a reboot?
The Aeotec stick has battery, does that prevent it from forgetting the routing, and how long would the battery last.
thanks