I received the pedal axles with sensors to correct the problem that the cadence and power data were falling slowly. The replacement procedure is very simple and it seems that the problem has disappeared.
My advice, stay away from the travel mode, in my case, after activating it was what made my pedals behave strangely. Maybe the cause of the problem may be different for everyone but well, I think that documenting each case can help others.
I leave here the video tutorial of the sensors replacement: