The tool [Select > Color Range] does not subtract mask color

I wanted to select something and then the selection “wraps” the selected thing. I don’t know if this function exists, I tried searching but I couldn’t find it…

Then I saw this Color Range tool that uses selection and color functions. I tried selecting and subtracting the transparent color but it doesn’t seem to work as it should. If the background is another color it works, it just doesn’t work if it’s a transparent color.

I put two screenshots in one image. The first one, with the transparent background, is the bug. The second, with the colored background, is what should happen:

Other information:
Aseprite: v1.3.2-x64 (downloaded from Steam, for linux)
OS: Ubuntu 22.04.3 LTS 64-bit

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