Before troubleshooting any deeper do take actions to follow all these best practice tips as most times symptoms like those are due to either EMI interference and/or not having enough Zigbee Router devices casing bad reception / dropped packages:
Before troubleshooting any deeper do take actions to follow all these best practice tips as most times symptoms like those are due to either EMI interference and/or not having enough Zigbee Router devices casing bad reception / dropped packages: