Maybe I misunderstand the nature of nested tags, but I'm sure this behaviour has changed somewhere along the line.
I'm attaching two screenshots of darktable.
In the screenshot "pano is visble.png", there is a multi-image pano (2nd last image, right hand end of top row of images), which I have tagged with "Vanuatu|Tanna|Mount Yassur|volcano".
Now, my thinking is that with nested tags, a search of any of the higher order tags (Vanuatu, Tanna or Mount Yassur) SHOULD include this multi-image pano.
Yet, if you look at the second screenshot I'm attaching, "pano is not visible.png", you can see that when I've done a "Collect images" search using "Mount Yassur" as the query, the multi-image pano is not visible in the collected images.
Is this the way it should be? Or is this a bug?
Thanks in advance.