In some rare support edge cases, Orca could start extruding a new layer before moving to the correct Z height.
This happened when two support layers were generated back-to-back and the next layer started exactly where the previous one ended. In that situation, there was no movement that naturally updated the Z position first.
The code was clearing the “pending layer change” flag too early, so it lost track of the fact that a Z move was still required.
This change ensures that if a layer change is still pending, Orca will always move to the correct Z height before the first extrusion of that layer.
This guarantees that every layer starts at the correct height and fixes the missing / incorrect support layers seen in those edge cases.
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