Question How is my shader interacting with itself?

I'm veeery confuse about something, I created a shader that works great with one object in the game, but as soon as I add one or more objects with the same material to the scene they start interacting with each other when I move them around or put them in some positions (they hate being close to each other or occupying the same "x" position, they are ok with the same "y" which doesn't make any sense to me) they change each other positions and sometimes become invisible (I suspect that they just teleport very far), without touching anything else, the objects are just simple sprites carrying the material, they are not doing anything else, I can't understand why they would do that as the shader doesn't seem to allow any interaction with itself, even without running the game (as I said if I have only 1 element with this shader everything works great)

Is there something here that would make 2 objects with the same material dislike each other?

 

I'm unsure, I have been reading around about it (never touched any batch at all) but changing it doesn't seem to affect, but I found the reason (still do not understand why) it seems to be the scale, I had those sprites on scale 0.2 (I needed them small) changing it to 1 makes them act normally, so I guess the solution is "remake" them in a smaller version and use the scale 1.

thank you very much for taking time to answer