My opinion was reasoned by assuming the green has really not disappeared,
The feathers would have been printed in one pass, I assume,
thereby it cannot be any other way, unless the ink was spoiled at print time, and you didn't pick it up.
Only speculation on my part, but I welcome any other suggestions.
Does the presentation pack offer help with "traffic lights" on the colours used?
If brown is not there, and green only, then I don't see any other explanation.
How about the "marriage" text, has that faded?