Changing the page order is going to delete annotations - there is no way to avoid that. If you remove pages from a song, all references to things on those pages are gone. It doesn't make sense to preserve data for pages you've removed. What you should have done is copy the song (long press the song, copy song on the library screen) and then modified the copy. The reason you can't just change the page order like that is that annotations aren't saved in the file itself - they are saved only in the database. So if you remove page references, everything related to those pages are removed from the database.
The annotations redesign is (tentatively) adding a feature that will automatically convert between PDF annotations and MobileSheets annotations. This will allow some modifications to existing PDF annotations, and will allow MobileSheets annotations to be saved in the PDF instead of in the database. This feature will limit what settings are supported though, as the PDF spec doesn't allow some things that MobileSheets supports.
Mike
McAroni - the bug fix for the forum post you linked to is to ensure annotations on pages are correct after changing the page order. I have a fix in place for that. Removing pages in the page order, saving those changes, and then adding the pages back is not going to bring back the annotations. That is not something I am going to support.
The annotations redesign is (tentatively) adding a feature that will automatically convert between PDF annotations and MobileSheets annotations. This will allow some modifications to existing PDF annotations, and will allow MobileSheets annotations to be saved in the PDF instead of in the database. This feature will limit what settings are supported though, as the PDF spec doesn't allow some things that MobileSheets supports.
Mike
McAroni - the bug fix for the forum post you linked to is to ensure annotations on pages are correct after changing the page order. I have a fix in place for that. Removing pages in the page order, saving those changes, and then adding the pages back is not going to bring back the annotations. That is not something I am going to support.