I've just started using Juice FX, and found a critical issue.
My sprite image has color with alpha, but the exported image shows no color at all.
It seems like alpha value decreases when it is exported.
So when a color has a lower alpha value (which is half transparent), the value goes down to zero or something. You can't see the color at all.
However, if a color has a higher alpha value, you can see the color on the exported image, but the color no longer has the same alpha value. It has a much lower value. So the color doesn't look the same as the original color.
Hope you can fix the issue soon.