Situation: I stacked several photos using the focus stacking feature. The sources window appeared correctly with all the stacked result plus the source photos. I then opened another photo (.nef) for editing in affinity photo out of xnview MP. The photo loaded and then I chose to swich back to my stacked photo. The stacked photo showed up but the sources window was empty.   Is this a wanted behavior? If so why? Is there a way to get the content of the sources window back?   Thanks in advance