When I try to navigate using the outline option in 4.05, only a limited range of the headings are available and I cannot scroll down the list to reach those further down the document. I can only about a third of the headings in the document. The problem is not the level of headings that I have ticked in the settings for the outline but the number of headings that I am able to see in the navigation list.
All working fine now.
Thanks for reporting this. We have been relating a number of bugfix releases in the 4.0.x series that take care of these issues reported here or in the Github issue reporting system. If you run Ubuntu Snap, an update should be installed automatically.