Sound issues using mains and SD cards

Yesterday I brought my URSA mini pro 4.6K - firmware 4.5 - on a production for the first time for recording an interview.

First thing, I plugged the camera to the mains and recorded to the SD card, using a radio mic. There was a popping sound going very low all the time.

So I used a Vlock battery. The popping sound was gone but a very low kind of clicking - think like a metronome - was going on this time.

Then I finally used my SSD recorder instead of the SD cards and all the noises where gone...

I used my radio mic for many productions in any cameras and never had an issue.
Sennheiser EW 112-P G3
Angelbird AB-AVP128SD AV Pro 128GB SDXC UHS-II Class 10 V90 SD Card

I'd love to use my camera on mains and record my interviews on SD cards so it's easier to pass them to a client.

Thanks in advance for your help and suggestions!
Luca

Here's a thread about a similar interference issue that may, or may not be limited to SD card recording on the Ursa Mini Pro.
https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=57925&p=374461&hilit=card+wireless#p374461
You should contact BMD support about the problem. And please do let us know what you hear back.

This is what I got back from BM support:

"From listening to the audio, I can confirm that this is behaviour which is known about on the Ursa Mini Pro cameras and has been escalated to the development team. We don't have a timescale on when this will be addressed as this is not information that we receive however if we do hear anything I will let you know.

In the meantime you will find that this behaviour can be alleviated by using a -20dB pad or by using a line in input."

The beeping is gone, but using the pad do increase the hiss...
I just further tested and I'm going to send my files to a sound recordist friend of mine and see what his comments are and let you know here.

Recording on SSD seems to be the work around for the moment.

I have just done some tests, you can download at this link:

http://www.lucarocchini.com/SOUND_TESTS_URSAMINIPROV4.5_1217.zip