[2.0.70] Train wagon layer order flips on ramps

[Factoriac]

When ascending a ramp traveling north, or descending traveling south, the layer order briefly flips in the middle of the ramp so wagons behind overlap the locomotive/wagon in front.
This is not very noticeable in vanilla, but is quite annoying when trying to create modded train graphics which is where I noticed the issue.

train bug.mp4

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[boskid]

Thanks for the report. I am considering this issue to be a minor issue that is unlikely to be fixed. Elevated rails are working on the edge of what is possible using 2d sprites to fake 3d graphics and i do not want to be introducing even more render layer hacks around rolling stocks.