1) I'm not sure if this would be a bug or a feature request as it's supposed to be working to my opinion. So here is my explanation :
- When recording on a channel using CW Decoder tool, no problem

- When recording on a precise TP without using CW Decoder AND recording a second channel from the same TP, no problem

But :
- When recording on a channel using CW Decoder tool AND trying to record a second channel on the same TP (using a different CW) it does record but only black screen.

2) I read in other topics or on Google that DD is not able to record 2 different channels (from different TP) at the time and needs to be started 2 times seperately in order to let us do so. However I didn't manage to launch it in two different instances as suggested...
Despite the fact that my last remark doesn't directly impact the problem previously described (because same TP), I'd be interested to know how to proceed to launch DD on more than one instance.

I hope you can help

Thanks again !