I create a slideshow the usual way.
The only objects i insert, are images.

The way i do this is the following:

slide = slideShow.createSlide();
			slide.setFollowMasterBackground(false);
			
			Fill fill = slide.getBackground().getFill();
			int pictureData = slideShow.addPicture(outputFile, Picture.PNG);
			fill.setFillType(Fill.FILL_PICTURE);
			fill.setPictureData(pictureData);

I guess its easy to understand.
after creating my slideshow, i open it in powerpoint and the first things i see are red X's or Crosses.

The Symbol for a image that can not be shown.
A workaround to see the images is so save the Slideshow againg and switch the viewing mode.

am i doing something wrong?
are there known issues?
i would like to see my images correct.

Regards,
DAniel