Batching draw calls of GO sprites with GO spine

Questions
5

I wanted to create similar topic, but found this.

In our project we faced with the big increasing of DrawCalls if use sortning Spine and Sprite GO’s

for example here with each added object and character add an addtional DrawCall:

image
image902×632 65.5 KB

Attached project for quick testing:
test.zip (24.0 KB)

does anyone know a possible solution for this case?

update:
tested in 1.4.0, I hoped that Added Create GO. Bones checkbox for SpineModel wil fix that, but nope.