Which product are you using?
PDF.js Express Version
Detailed description of issue
I try to load document to viewer and next import (and show) only my custom xfdf annotations, but when the pdf already has annotation they are loaded first.
Annotations already contained in the file are not loaded, or they are deleted immadiantely after document loaded.
Manual removing all annotation after documentloaded event not works because annotations are showed later. Moreover annotationsLoaded event is never fired.