ShareX image editor: on transparent background image smart eraser should replace the colored pixels by transparent background

[WiliTest]

On PNG files with a transparent background I want to remove some colored pixels (to put instead the transparent background). The smart eraser of the image editor should erase the pixel and replace it by transparent background. It currently doesn't seem to do anything else than drawing a transparent square on top of the colored pixel. (I did not find any alternative like the brush to "paint" the colored pixels using a "transparent color").

Thanks for fixing this issue.