Just realized the user interface for my lighting groups is broken and, while I can turn them on/off and change the colour, I can’t change dimming level or colour temperature inside the app.
From the advanced website everything works fine calling setLevel and setColorTemperature in the group device. Routines using the group also work fine to change those attributes.
In the app the temperature slider does nothing and when trying to change the dimmer level of the group there’s this error:
I believe the actual problem is the ranges for level and temperature in the group, so the app cannot display them properly. On/Off state or colours work fine since they don’t have ranges that need setting, just the state.
Out of curiosity I created a new group, was fine initially, then removed one device and it broke again. I guess something breaks (or does not update) in the group regarding dimming and temperature when the composition or something else changes. Edit: also just tried creating a new group without removing anything, initially works, then moments later temperature kept working but not dimming. When it breaks you no longer see the dimmer value or the temperature.
Can’t say for how long it’s been broken since I never use the groups for manual control through the app and rely on smart buttons and routines (and those work fine). Anyway, seems like a bug in the groups feature or in the app (it’s Android, version 1.8.29.24 BTW, and the devices in the group are Matter lights).