Im having this issue which is new as the last time I tested the site on preview it didnt happened. Dont know if is a Webflow issue or something at my end.
So basically the link in the navbar even though they point to the correct page they open up as "webflow.com/Pagehere".
I have attached the link of the nav link setting plus a page of where does it open instead of "Our company" page in this example.
Here my settings (Pointing to open "Our Company")
Here the result when I click it: