[gdal-dev] gdal_translate -expand rgba behaving incorrectly, pct2rgb.py working correctly on a tif

[B H]

Hi,
I am processing a bunch of tifs where the gdal_translate and pct2rgb.py
seem to be behaving differently.
Is it a bug in gdal_translate, or I need to pass some options to get
correct behavior.

gdal_translate -expand rgba  a.tif  gdalbad.tif  # This produces a tif file
with _incorrect_ colors.
pct2rgb.py -rgba a.tif  gdalgood.tif # This produces the tif file with
correct colors.

I am using QGIS to view all the tif files.

I have tried it on gdal 3.4.3 and on some earlier versions. The  behaviour
is the same.
I have also opened a bug mainly to attach the sample tif file.
https://github.com/OSGeo/gdal/issues/9402

Best,
HB
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