FLS-M: Zigbee scenes and groups only trigger one endpoint

Hi!

I’m using an FLS-M to control two CCT RGB strips via Zigbee in one fixture.
To reduce load on the network, I want to control both strips as part of a zigbee group.
I also want to use scenes.

I use zigbee2mqtt for zigbee interaction.

I keep having problems when using scenes and groups, though:

  • Both endpoints seem to have their own scenes cluster. This makes handling scenes slightly unwieldly (at leat in zigbee2mqtt) but it can be worked around
  • I can add both endpoints to a group. Toggling state and brightness works for the group a expected. However setting color_temp will always only change the color_temp of one of the two endpoints (the one that was first added to the group)

More context can be found here: Light with two endpoints: Only one endpoint answers to color_temp · Koenkk/zigbee2mqtt · Discussion #30237 · GitHub

This might be related to FLS-M Philips Hue scenes