RTL Issue inside sdr-scanner container

[Sonic]

Hey Guys,

I had this working in docker but added another rtl-sdr and it stopped working and now I get the below error inside the docker container "sdr-scanner" then it dies

Kernel driver is active, or device is claimed by second instance of librtlsdr.
In the first case, please either detach or blacklist the kernel module
(dvb_usb_rtl28xxu), or enable automatic detaching at compile time.

any ideas?

I've tried blacklisting on docker host and udev rules.

I'm missing something simple...

Thanks
Sonic