I imported a Word file that has a lot of linked footnotes into InDesign 2018. Spread by spread, I touch each paragraph to fix overrides. There is no reflow of text when I do this step. Yet when I do a plain "save" before going to the next spread, InDesign is taking 37 seconds to save. 37 seconds of watching the rainbow spin. InDesign is acting like it is reflowing every page in the background as it quick saves. That should not be necessary. The last time I experienced this type of slowness was back in the PageMaker days. The book is over 300 pages. 37 seconds a spread really adds up.