Humming noise when using Phonak ComPilot II

I have a Compilot II with Phonak HA and am experimenting problems with a hum when I turn off the compilot or it disconnects from Bluetooth. Also, when I walk through Walmart’s anti theft detectors I get a loud buzz. Anyone run into this problem and identified a fix?

@Perk my old Phonak Audeo aids used to buzz going through the security detectors. This was before my Compilot 2 was being worn. So I’m not sure that it’s definitely your compilot 2.

My Phonak HA hums when I’m on telecoil program and it’s worse depending where I am.