Just upgraded to the newest build (25.8.0) on Linux Mint Cinnamon, and suddenly Navigator seems to be primarily for moving headed sections around rather than navigating straight to them.
I normally have Headings selected, so I would expect to jump to parts of the document just by double-clicking on a heading in the list, but now nothing happens except, it seems, the equivalent of rapidly single-clicking twice – and single-clicking on a heading in the list selects it for either moving around (if you click again in the list) or being e.g. hyperlinked or copied as text (if you click in the document itself, both left- and right-clicking bringing up exactly the same menu). It’s also possible to drag-and-drop within the list, a function I’ve never used before.
Right-clicking on an entry in the heading list gives “Go to” as an option (or selecting and pressing Enter), but why doesn’t double-clicking do that any more? Is there a new option that needs to be set to use Navigator purely to navigate around the document, without risking moving sections around unintentionally? All worked as normal in the last version I used (25.2.5), which I may have to revert to.