We typeset books. Though most of our titles print black only, we often style elements in the text a color other than black so that element stands out as we're paging, and later we change the color to black as we prepare to send the proof to the publisher. Usually the element is a superscript for auto footnotes. Sometimes when we change the color the paragraphs reflow. We don't change the size, font or style of the element--we only change from red, say, to black. This seems to only happens on books that use auto footnotes. Does anyone have any ideas?
In order to help you on this, we would require some more details like
Operating system (Exact version Windows or MAC)
Exact version of InDesign
Also share the complete workflow and some screenshots if possible.
Any chance these books have been opened from a prior version of InDesign?
Reflow happens when