Transparency in Acrobat / Preview / Indesign / PDF
I have a question concerning Acrobat Reader DC and the Preview App (Mac Sierra)
I was exporting a PDF for print from Adobe Indesign. When opening in the Preview App I am seeing color-changes in the transparent areas of the embedded TIFFs. When opening the same document in Adobe Acrobat (Reader & Pro) I do not see any color-changes in the transparent areas.
Is this a bug in the Preview App or is something in the export-/ color-settings of Indesign not the way it should be?
This is how the document looks in Preview:

This is how the document looks in Acrobat (Reader DC & Pro 8):

If someone has an idea what this is about, it would be a great help to know...
Thanks in advance!
S
