#192 psd thumbnails have transparency issues when file has alpha channels/saved selections

[Samuel Aguirre]

File thumbnail displays incorrectly, despite what is visible in the canvas, when there are saved selections/alpha channels present in the file. It seems that only the masked contents of the first alpha channels are visible in the thumbnail in Windows 10 file explorer.

When the alpha channels are removed and the file saved, the thumbnail displays correctly (without the transparent parts), but I would love to hear there's a way or workaround to avoid having do delete the alpha channels and still having the thumbnail display correctly. Images demonstrating the issue are in the attachments.