Bug ? Live loop saved with no sound

I am encountering this problem which I guess is a bug but not sure.

Live loop itself is functional, but every time I save it, the sample file is silent.
If the loop is 10 seconds, the result is the 10 seconds wav file with complete silence.

As a workaround, if I save the project, S2400 creates “liveloop.wav” file in the project folder.
This one does have a sound in it, so that thereafter I can assign this file to any pad.

(It was not easy at all to find this out)

I am with the latest firmware with DSP card.

Is there anyone with the same issue ?

So I could learn this behavior occurs just when I turn the “monitor recording” off in the live loop setting menu.

I turn it off to record DSP via USB, because otherwise there will be a feedback problem.

Gradually getting close to the desired workflow using DSP.