I did a check here and in github issues to see if this has been noticed, and it didn’t appear to be. I’m noticing that when I create an export of a book (Pressbooks XML), the xml that’s generated is including content that lives in the trash for that book.
I’ve tested this against our 5.5.6 instance and against the pressbooks dev branch with all other plugins turned off, and the behavior is the same.
Is this intended behavior? If so, is there a place to disable this functionality?