[2.1.9] Items on belts swap side on belt when applying blueprint

[erkon]

When applying a blueprint on top of an existing belt, the items on the belt swap. I have never seen something similar, and I don't know if my game state is corrupt, or the blueprint is corrupt, or something else. Example: green chips on one side of the belt and gears on the other side. After applying a blueprint that upgrades other part of my factory, the blueprint contains the entities already placed, and the green chips and gears have now swapped side. I am using staged blueprints in a blueprint book.
Pre-blueprint

07-08-2026, 21-45-11.png (285.51 KiB) Viewed 150 times

Post-blueprint

07-08-2026, 21-49-21.png (282.32 KiB) Viewed 150 times

Saved game attached

[Loewchen]

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