Warning : HTML 1300 Navigation occured?
From their website:
HTML1300
"Navigation occurred"
A new page was navigated to, or the current page was refreshed.
This is an informational message and not an error. To filter this message, right click the console pane, click Filter, and then uncheck Info.
In other words: I wouldn't be too worried about it if I were you.
UPDATE
Effectively this is an open issue on the Microsoft Edge developer teams plate, and has been for quite some time. One of the many tickets can be seen here: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/13246371/
That said, there's not much you can do until they fix Edge to follow the specs, so still, there's not much you can do.