Technical grande punto parking sensor strange behaviour

[wintan]

Hi all,

Looking for a pice of advice.
Have replaced 2 failed parking sensors and everything works great until...
Until you start terning the steeting wheel. When rear gear is engaged and you're turning the steering wheel parking sensors start either beeping randomly or constat beep. If you do not touch the steering wheel everything is ok. In both situations distance is monitored correctly.

Any ideas whats wrong?

Thanks in advance