Make black background on panorama stitches transparent/editable when applying adjustments

What problem do you see this solving?
When applying clarity,saturation, contrast, etc., adjustments the black background creates a halo on the image stitched. this is really annoying and poorly implemented.

When was the last time you were affected by this lack of functionality, or specific tool?
every time I apply these and other adjustments. So, I apply them minimally, then 'roundtrip' to Adobe PS 25 where I use generative fill to eliminate the black background. Then it goes back to C1. This is a wasted step.

Are you using any workarounds or other solutions to achieve your goals in Capture One?
Doing the aforementioned creates another intermediate file that is large. I use a Phase One IQ4 - the TIF and DNG files generated are huge, around 900mb. Dealing with a mess of these files is a pain in the neck, when completed raw editing could be done in C1 if the black margin did not interfere.

Are you happy to be contacted further about this suggestion or request?
YES