1.6.4 Serious color coding bug in the Export function

[Kadet]

[1.6.4] Win 11 - 64 bits

I just discovered a serious bug when using the Export function. This doesn't always happen, but when it does, it is noticeable.

_TEST_FILE - exporting_.png

As you can see in the image on the right, the colors are paler than the original on the left. When I press the 'Export' button, these broken colors are saved in file on the disk. The output format does not matter.
Everything is fine when I use the 'Save as' function.

Here's an image for testing:

_TEST_FILE_.png

Please fix it ASAP.

Edit:
It's happens when ICC profile is ON.

[xnview]

could you send me the ouput file? What do you have in 'settings>Color profile'?

[Kadet]

I make few tests more.

On/Off profile ICC has no effect on saving.

Saving is affected by the 'keep ICC' option. IF is ON in 'save as' function ICC profile is saving to file, but is not saving in Export function and we have wrong picture. IF is OFF in both file we have bugged image.

Output file:

_TEST_FILE - EXPORT_.png

[Load]
...
ICCIntent=1
ICCProfile=
useSystemICC=true
ICCRGBDefault=1
ICCRGBDefaultProfile=
ICCCMYKDefault=1
ICCCMYKDefaultProfile=

[Save]
addExtensionIfNeeded=true
keepOriginalDate=true
keepEXIF=false
keepIPTC=false
keepXMP=false
keepICC=true

[xnview]

Thanks to your detailed description I can reproduce the problem.

[xnview]

This problem is supposed to be fixed in XnView MP 1.6.5. Please check and confirm the bug fix here.

[Kadet]

Problem is resolved in half.

Still bug is when I export file to JPG, JPEG-XL, JPEG-XR, JPEG-2000

This is interesting, that when I use the "Save as" function and save a JPG file, and then I use export to JPG, the ICC is saved during export.

I also see something else, that ICC is not saved for JPEG-XL also with the "Save as" function.

[xnview]

Currently ICC profile is not supported for JPEG-XL, JPEG-XR, JPEG-2000 output