Hi guys,

Had the same problem as you describe, already announced the supplier for the warranty. But, I discovered that when I took the cadence sensor off the bike and activated it with the magnet, it worked!
So I concluded that the signal was not received properly by the computer, and indeed, it was. Because I see on the pictures that you have placed the computer on the bar exactly as I did. In this case the frame and all the aluminium casts a too big show in the rf beam between the sensor and the computer.
I moved the computer to the perpendicular steering bar to the left, so that the computer and the sensor can "see" each other and that did the job for me.
Now my cadence sensor is online every time.
Try it and let me know, good luck.