Tradfri e12 - unable to get the bulbs to pair. I receive the following warnings when attempting to pair.
[bellows.zigbee.application] Message on unknown device 0x6c21
2017-08-17 00:17:53 WARNING (MainThread) [bellows.zigbee.application] Unexpected message send notification
2017-08-17 00:17:53 WARNING (MainThread) [bellows.zigbee.application] Unexpected message send notification
2017-08-17 00:17:54 WARNING (MainThread) [bellows.zigbee.application] Message on unknown device 0x6c21
2017-08-17 00:17:54 WARNING (MainThread) [bellows.zigbee.application] Unexpected message send notification
2017-08-17 00:17:54 WARNING (MainThread) [bellows.zigbee.application] Unexpected message send notification
2017-08-17 00:17:54 WARNING (MainThread) [bellows.zigbee.application] Unexpected message send notification
2017-08-17 00:18:07 WARNING (MainThread) [bellows.zigbee.device] [0x8c09] Failed ZDO request during device initialization: ('Endpoint request failed: %s', [129, 51609, []])
Edit - My current config is HomeAssistant 0.51.1 on a pi3 with a Linear HUSBZB-1 stick.