This delay is set within Navbar settings > Duration. You’ve currently got 500ms set - screenshot here. It’s worth playing around with this duration til you find what you’re happy with.
Thank you! Unfortunately, this suggestion didn’t fix the problem.
I messed with the duration and the delay still happened. It went away only when I set the duration to “0” but that removes the easing effect of the drop-down menu (which I would like to keep).