Cadence not displaying after Cad lost

[placours]

Last week , I received the message CAD lost when use my iBike .

I replace the magnet , and it did work correctly , it happen a another time and know I'd just see the Calorie.

I assume that the cadence is working now because the power is displaying correctly. But when I load my ride in Isaac I see cadence with 0 value but power record are OK.

To fix the problem , I try hard reset and change value to cad Off an Cad On with iBike setup screen but with no success.

Can I do something to fix the problem.

Thank you for your support

Louis-Philippe