Niko 552-721X2 decoupled mode doesn't work as intended

[nlspln]

What happened?

When setting the switch to decoupled, the buttons no longer work at all. Home assistant (and z2m) report "null" as action.

What did you expect to happen?

I can see the correct action being triggered by pressing the switch button.

How to reproduce it (minimal and precise)

Push any of the two switches' corresponding buttons while set to decoupled mode.

Zigbee2MQTT version

1.28.0-1 and 1.28.0-dev commit: 22d2170

Adapter firmware version

20220219

Adapter

SONOFF ZigBee 3.0 USB Dongle Plus

Debug log

Debug 2022-10-20 11:24:23Received Zigbee message from 'Living Room / Kitchen Lights', type 'attributeReport', cluster 'manuSpecificNiko2', data '{"switchAction":16}' from endpoint 1 with groupID 0
Info 2022-10-20 11:24:23MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights', payload '{"action":null,"action_l1":null,"action_l2":null,"linkquality":120,"operation_mode":"control_relay","operation_mode_l1":"decoupled","operation_mode_l2":"decoupled","state_l1":"OFF","state_l2":"OFF"}'
Debug 2022-10-20 11:24:23Received Zigbee message from 'Living Room / Kitchen Lights', type 'attributeReport', cluster 'manuSpecificNiko2', data '{"switchAction":64}' from endpoint 1 with groupID 0
Info 2022-10-20 11:24:23MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights', payload '{"action":"single","action_l1":null,"action_l2":null,"linkquality":120,"operation_mode":"control_relay","operation_mode_l1":"decoupled","operation_mode_l2":"decoupled","state_l1":"OFF","state_l2":"OFF"}'
Info 2022-10-20 11:24:23MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights', payload '{"action":"","action_l1":null,"action_l2":null,"linkquality":120,"operation_mode":"control_relay","operation_mode_l1":"decoupled","operation_mode_l2":"decoupled","state_l1":"OFF","state_l2":"OFF"}'
Info 2022-10-20 11:24:23MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights/action', payload 'single'
Debug 2022-10-20 11:24:24Received Zigbee message from 'Living Room / Kitchen Lights', type 'attributeReport', cluster 'manuSpecificNiko2', data '{"switchAction":4096}' from endpoint 1 with groupID 0
Info 2022-10-20 11:24:24MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights', payload '{"action_l1":null,"action_l2":null,"linkquality":127,"operation_mode":"control_relay","operation_mode_l1":"decoupled","operation_mode_l2":"decoupled","state_l1":"OFF","state_l2":"OFF"}'
Debug 2022-10-20 11:24:24Received Zigbee message from 'Living Room / Kitchen Lights', type 'attributeReport', cluster 'manuSpecificNiko2', data '{"switchAction":16384}' from endpoint 1 with groupID 0
Info 2022-10-20 11:24:24MQTT publish: topic 'zigbee2mqtt/Living Room / Kitchen Lights', payload '{"action_l1":null,"action_l2":null,"linkquality":127,"operation_mode":"control_relay","operation_mode_l1":"decoupled","operation_mode_l2":"decoupled","state_l1":"OFF","state_l2":"OFF"}'

Hope this helps.

[nlspln]

Similar to #13737

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