Occasionally my window sensors go offline. Will this cause the alarm to go off?
Good question @ND11! If your Sensors cannot communicate efficiently or consistently, this can certainly cause functionality differences such as triggering or even being bypassed, in an armed mode. To avoid any false alarms or accidental dispatch, it will be best to improve the signal to these Sensors. The Alarm Range Extender should help with this! 
Well since I have had this system I have had issues with the signal. Spent a Lot of time with tech support but could not pinpoint the interference. All sensors finally connected to the base one day but still occasionally one will disconnect