I’m testing OSRAM Lightify tunable white and RGBW.
Until last week they were working Ok, yesterday when I opened the app I realized I can’t control the color temperature anymore. It stays 2703K.
Also, not sure how it is related but for the tunable white you can see the dimmer slider is off position:
For the tunable white I tried switching the device type between “ZigBee White Color Temperature Bulb” (which was the one assigned to the bulb) and “OSRAM Lightify LED Tunable White 60W” and even though the UI changed, the behavior was the same.