hardware:JN5169
software:zigbee 3.0 --- end device
The end device has been added the network built by coordinator. The end device will poll 250 milliseconds once. Sometime, the following phenonmena are as follows when I remove coordinator(poweroff).

bag tool:Ubiqua Protocol Analyzer
The last beacon request is too long to come. This will result in a large amount of electricity consumption.
How can I control the exception?