Sprites with persp camera sometimes disappear

Greetings,
I’m doing some parallaxing effect with a perspective camera to create a 2d side scroller. I have a player gound, a mid ground and a background layer so far, all of tem consist of around a hundred sprites. As the player moves around, some sprites randomly disappear along the way. How to get rid of this? The different grounds are far enough so they don’t overlap. The same elements of a ground have the same Z value.
Thanks in advance.

Sod it, just found sprite render order that took care of the issue.