Brightness feedback from Gledopto RGBW controller not correct

I have noticed that after a restart of my Gledopto controller GL-C-007 the brightness feedback is wrong in HA.
When observing the MQTT messages it seems that the correct value is followed immidiately by a wrong one. Anyone knows what can cause this?

Client mosqsub|896-RPi-4-HA received PUBLISH (d0, q0, r0, m0, ‘zigbee2mqtt/light_trappe’, … (112 bytes))
zigbee2mqtt/light_trappe {“state”:“ON”,“color”:{“x”:0.332,“y”:0.225},“color_temp”:181,“white_value”:-1,“linkquality”:76,“brightness”:177}
Client mosqsub|896-RPi-4-HA received PUBLISH (d0, q0, r0, m0, ‘zigbee2mqtt/light_trappe’, … (111 bytes))
zigbee2mqtt/light_trappe {“state”:“ON”,“color”:{“x”:0.332,“y”:0.225},“color_temp”:181,“white_value”:-1,“linkquality”:78,“brightness”:76}