When I open a layout that is part of a book - currently have 24 different chapters in a book format - I make changes and save and close that file. It is saved. The book project palette shows an error symbol. Why? That file was just saved. So I double-click that file, it opens, the warning symbol goes away, I close that file off without needing to save it. Annoying bug needs to go away. Immediately.

Latest version - probably been a bug for a decade or more.

Steps - open file, edit, save, close off, error flag shows up.

Expected result - don't show me an error on a file that has no error

Actual result - this is a bug.

No need for screenshot.