Master page bug
When I try to adjust a master page in Indesign cc2019 (14.0.1) it makes a real mess. It used to be that if I had, for instance, a master page with a 6p margin on all sides and including threaded text boxes across the spread, if I changed the outer margin to 7p instead, the text box would automatically fit the new space. Now, the text box box turned into a very tiny box in the inner margin that has no relation to the margins I have set. In addition, other boxes on the page which are not part of the threaded text jump into strange and useless positions. For a book designer this is a nightmare. It means when you are working on a design you spend endless extra time readjusting boxes that then, for some reason don't always work correctly on the actual book pages. This NEVER happened in CC2018 so I think it's a bug or at any rate a major mess-up. Please fix!
Beth Shagene commented
I'm a book designer having the same issues. Plus, any graphic on the master pages disappears whenever I attempt to tweak my master page margins and "Adjust Locked Content" box is checked.