Bug with 2023 InDesign New Book palette

Hi @danielh42350231, I think the problem might be connected to the fact that the book panel automatically renumbers your chapter pages as you add chapters. 

Example:

Chapter 1 starts on page 1 and finished on page 9.

If your settings specify that each new chapter will begin on a right hand page (odd number), then the book will add a blank page 10 and start chapter 2 on page 11. That could shift your left/right pagination, reflow the text, and shift text frames and graphic frames all over the place.

Solution:

Control the pagination and layout.

1. First, in Document Setup, check that each chapter is set the same for facing pages or single pages. Don't mix and match within a book.
    
2. Control what happens when the book has more than one chapter. You want to control the pagination, as well as whether a new page will be added (as described above). From the Book Panel's options menu, select Book Page Numbering Options. Specifically, check the appropriate option to continue on the next odd or even page.
    
3. Control the pagination of individual chapters with the Pages Panel. Select the first page thumbnail in the chapter, right-click and select Numbering & Section Options, and maybe check/uncheck Allow Document Pages to Shuffle and Allow Selected Spread to Shuffle. 

Take a look at these Adobe help articles:

https://helpx.adobe.com/indesign/using/creating-book-files.html

https://helpx.adobe.com/indesign/using/pages-spreads-1.html