Colors for indexed Aseprite images are wrong unless the first color is transparent

[Autofire]

When I imported an indexed image, the colors were all wrong. I realized that the order of the colors wasn't normal, so I shuffled them around. The issue went away. After playing with it, I now know that the first color in the color palette must be transparency for it to correctly import the image.

This is what it should look like:

This is what it looks like if transparency isn't first: