Bookmarks in recent pre-release builds of SumatraPDF are not functioning correctly. The bookmark for the first page (i.e. the first bookmark) is missing and the bookmarks for the last 2 pages are going to the same page. I have created bookmarks in PDF-Exchange Editor and verified that they are functioning correctly in earlier versions of Sumatra and in MS Edge.
Please provide a document that shows the problem and preferably create a bug report via https://github.com/sumatrapdfreader/sumatrapdf/issues/new (as described in https://www.sumatrapdfreader.org/docs/How-to-submit-bug-reports.html)