Animated gif glitched. Why?
Hello I don't know why sometimes this happens:

I have a simple background and an animated gif of a airplane with transparency. But I don't know why, sometimes this kind of gifs keep the previous frame util the end of the gif.
I saw that this happen when you have empty frames before the animation start but in is not this case.
Anyone knows why? Any solution?
I did the movement with AFX and later I tried exporting like video, mov and png secuence and finally I exported for web from Photoshop.
Thank you.

