Blue light on the tri-color LED indicator

The image in the app of our new Ultraloq U-Bolt Pro WiFi shows a blue light on in the LED indicator. But ours only shows green and then nothing else. What is the blue light for and what does it indicate?

I have U-Bolt without WiFi, but on the bridge there are two LEDs. The WiFi status LED shows green when connected and the Bluetooth LED shows blue when connected (note, the WiFi - in the bridge - is continuously connected but the BT only is connected when data is being transferred between the lock and the bridge to save battery power in the lock)