v27 - download view - new jpegxl file - thumnail on file is black

[masterjp]

I converted a jpeg file from jpeg to jpeg xl format.
The source and destination folder was the download folder.

I do not see a thumbnail of the destination jpeg xl file in download folder.
A swipe down does not refresh something.

I can open the file in xnview and see the picture.

If i switch to device memory and the download folder, I will a thunbnail on the jpeg xl file.
So I think the download folder thumbnails do not correctly refresh.