Z-fighting at open up zoom levels

[just-website]

Hello. I have an example with a composite layer. There are problems with it when the camera is far away.
I expect the composite layer elements to be stacked on top of each other. but they begin to mix. Following the recommendations from similar discussions, I try to add/change settings:

1. getPolygonOffset function
2. getPosition function (this has a good effect. The larger the value I set for z-cords, the further I can remove the camera without rendering bugs. but large values ​​will hide resources at a short camera distance)

I also try to enable fp64 for all layers, but I don’t see any effect.

EXAMPLE

Any ideas?