How do I work around the game-breaking “Tomb of the Lost Adventurer” DLC bug (can't climb plane)?

I’ve had to restart this area three times now due to a bug that prevents completion – on the PC, if you burn the trees in the order that you’re supposed to, the plane breaks incorrectly and you cannot complete the DLC.

I’ve found a few links (1, 2) that claim to have workarounds, but they’re very unclear (eg. “Start with the right-most fire” does not help, as there are two rightmost fires!)

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  • Also, apparently Eidos believes they fixed this issue, but they definitely have not, as I just today encountered it (PC, Steam version, latest update).

    So, what order do I have to light the fires to work around this bug?

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