Transparent traces of rectangle in texture instancing

Hi all,
I have a project with a lot of rectangles that are used inside a geo as texture instances.
But I can see some edges around my rectangles like edges. And I see some traces of the transparent part of my rectangles on my camera. I have added a .toe. Can someone please help me.
20211117_rectangles displacement - view black edges.toe (5.7 KB)