I’d just like to confirm that the current behaviour is possibly a limitation of HomeKit, not a bug in the LIFX app:
If I set a theme across my LIFX Z strips and save that to a scene in the LIFX app, recalling the scene sets all the zones correctly.
However, if I copy this scene to HomeKit and then trigger the copied scene, I get a single colour across each strip (not by zone).
Is this expected?