Max renderers and sorting groups on scene?

Got this error: “Number of renderers and sorting groups handled (4096) is greater than the limit (4095), Sorting Group is disabled.”

Ite’s strange, because I have on scene:
sprites - 4236
sorting groups - 725
mesh renderers - 549

Anyone have an idea which meshes are causing this problem? Is it so mych problem to have so many sprites and objects on a scene? Maybe someone gime me a ideas or links for optimizations.

“Number of renderers and sorting groups handled (27673) is greater than the limit (4095), Sorting Group is disabled.”

I don’t get it, I have 3 different sorting groups. I have a crapton of sprites in the scene, but surely Unity can’t limit those to 4095?