Also see related discussion here:
FYI, ITead have just release a new firmware for Sonoff ZBMINI-L that is meant to address delay issues:
https://github.com/Koenkk/zigbee-OTA/tree/master/images/Sonoff
https://github.com/zigpy/zha-device-handlers/issues/1519
_Originally posted by @Daniel-zhan-itead in [Device Support Request] ZBMini-L delayed response after minutes of pairing. Workaround found on Zigbee2MQTT · Issue #1519 · zigpy/zha-device-handlers · GitHub
We have raised the pull request for the OTA update image on github Pull requests · Koenkk/zigbee-OTA · GitHub.
Once it is approved, you can download the image and update the ZBMINI-L devices.
_Originally posted by @Daniel-zhan-itead in [Device Support Request] ZBMini-L delayed response after minutes of pairing. Workaround found on Zigbee2MQTT · Issue #1519 · zigpy/zha-device-handlers · GitHub
Feature: Added Poll Control Cluster private attribute 0xFF00 (enable/disable configuration), the default Poll Control Cluster initial configuration is disabled
Bugfix: Random shutdown issue