GLES2 sprite disappearance

[boyscout-ninja]

Hi,
I am dealing with an issue which seems to be solved for GLS1 but I can not find a solution for GLES2, I already opened a post (http://www.andengine.org/forums/gles2/sprite-disappears-t6686.html), but it is still without solution.
Is it a bug? is there any kind of solution?

Thanks,

Iván