TERNCY-PP01 awareness switch is not giving state update

[70MM13]

I'm running zigbee2mqtt with a ConBee2 and am trying to get this Terncy device to work.

It seems to pair ok, see debug log below:

Zigbee2MQTT:info  2021-01-11 19:05:44: Zigbee: allowing new devices to join.
Zigbee2MQTT:info  2021-01-11 19:05:45: MQTT publish: topic 'zigbee2mqtt/bridge/config', payload '{"commit":"07cdc9d","coordinator":{"meta":{"maintrel":0,"majorrel":38,"minorrel":88,"product":0,"revision":"0x26580700","transportrev":0},"type":"ConBee2/RaspBee2"},"log_level":"debug","network":{"channel":11,"extendedPanID":"0xdddddddddddddddd","panID":6754},"permit_join":true,"version":"1.17.0"}'
Zigbee2MQTT:info  2021-01-11 19:05:51: Device 'awareness_terncy' joined
Zigbee2MQTT:info  2021-01-11 19:05:51: MQTT publish: topic 'zigbee2mqtt/bridge/event', payload '{"data":{"friendly_name":"awareness_terncy","ieee_address":"0x000d6f0014cc4960"},"type":"device_joined"}'
Zigbee2MQTT:info  2021-01-11 19:05:51: Starting interview of 'awareness_terncy'
Zigbee2MQTT:info  2021-01-11 19:05:51: MQTT publish: topic 'zigbee2mqtt/bridge/event', payload '{"data":{"friendly_name":"awareness_terncy","ieee_address":"0x000d6f0014cc4960","status":"started"},"type":"device_interview"}'
Zigbee2MQTT:info  2021-01-11 19:05:51: MQTT publish: topic 'zigbee2mqtt/bridge/log', payload '{"message":{"friendly_name":"awareness_terncy"},"type":"device_connected"}'
Zigbee2MQTT:info  2021-01-11 19:05:51: MQTT publish: topic 'zigbee2mqtt/bridge/log', payload '{"message":"interview_started","meta":{"friendly_name":"awareness_terncy"},"type":"pairing"}'
Zigbee2MQTT:debug 2021-01-11 19:07:03: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{"modelId":"TERNCY-PP01"}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:03: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{"modelId":"TERNCY-PP01"}'
Zigbee2MQTT:debug 2021-01-11 19:07:07: Received Zigbee message from 'awareness_terncy', type 'commandQueryNextImageRequest', cluster 'genOta', data '{"fieldControl":1,"fileVersion":142,"imageType":0,"manufacturerCode":4648}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:09: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{"manufacturerName":"Xiaoyan"}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:09: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{"manufacturerName":"Xiaoyan"}'
Zigbee2MQTT:debug 2021-01-11 19:07:17: Received Zigbee message from 'awareness_terncy', type 'commandQueryNextImageRequest', cluster 'genOta', data '{"fieldControl":1,"fileVersion":142,"imageType":0,"manufacturerCode":4648}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:19: Received Zigbee message from 'awareness_terncy', type 'commandQueryNextImageRequest', cluster 'genOta', data '{"fieldControl":1,"fileVersion":142,"imageType":0,"manufacturerCode":4648}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:21: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{"powerSource":3}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:21: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{"powerSource":3}'
Zigbee2MQTT:debug 2021-01-11 19:07:24: Received Zigbee message from 'awareness_terncy', type 'commandQueryNextImageRequest', cluster 'genOta', data '{"fieldControl":1,"fileVersion":142,"imageType":0,"manufacturerCode":4648}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:32: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{"zclVersion":3}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:32: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{"zclVersion":3}'
Zigbee2MQTT:debug 2021-01-11 19:07:38: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:38: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{}'
Zigbee2MQTT:debug 2021-01-11 19:07:42: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:42: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{}'
Zigbee2MQTT:debug 2021-01-11 19:07:46: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{"hwVersion":1}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:46: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{"hwVersion":1}'
Zigbee2MQTT:debug 2021-01-11 19:07:50: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:50: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{}'
Zigbee2MQTT:debug 2021-01-11 19:07:54: Received Zigbee message from 'awareness_terncy', type 'readResponse', cluster 'genBasic', data '{}' from endpoint 1 with groupID null
Zigbee2MQTT:debug 2021-01-11 19:07:54: No converter available for 'TERNCY-PP01' with cluster 'genBasic' and type 'readResponse' and data '{}'
Zigbee2MQTT:info  2021-01-11 19:07:54: Successfully interviewed 'awareness_terncy', device has successfully been paired
Zigbee2MQTT:info  2021-01-11 19:07:54: Device 'awareness_terncy' is supported, identified as: TERNCY Awareness switch (TERNCY-PP01)

But there comes no data from the sensors, or when actuating the button.
All that regularly pops up is the following:

Zigbee2MQTT:debug 2021-01-11 19:12:23: Received Zigbee message from 'awareness_terncy', type 'commandQueryNextImageRequest', cluster 'genOta', data '{"fieldControl":1,"fileVersion":142,"imageType":0,"manufacturerCode":4648}' from endpoint 1 with groupID null

Is there something to do to investigate this? or do I just have a broken device perhaps?
Or maybe does this thing first need to pair with a Terncy bridge to receive an OTA update before the magic begins?
Or.. could it be the ConBee2 (I don't have an other device to test with)

Can someone shed some light on this?
thanks in advance,

Wimpie