I discovered this while testing another formatting issue. If you have a document that has headers with text after each header, select all and apply the "Normal" style, all of the headers format properly but they are pulled from their places and stacked at the top of the document. Attached are screenshots to explain. Tried on updated Chrome Version 75.0.3770.100, no extensions, cache emptied, both in a game handout and on forums. The console doesn't report anything during the operation, so I have not included a log. Firefox does not show this errant behavior. Before: After: