Strange behavior of material (blend mode opaque) placed on instanced static mesh

Development Programming & Scripting C++
1

Hi,

I have very strange rendering of material (blend mode opaque and Masked) placed on instanced static mesh.
Please look at video -> https://youtu.be/m703PYG2xn4

When I generated instances in instanced static mesh it looks like Antialiasing is activated after I move the camera.

If I set blend mode to Additive or Translucent it works fine.

Where is the problem ?

Thanks