Vantage menu jumping when loading page

Hello. First of all, thank you very much for a fantastic theme. Doing some testing, and have one question.
I have a logo bigger than the height line (height is 70px). When the logo is in the menu, and i dont use constrain logo height, the menu begins appearing from the top and after 1 second “sits” in the middle. Should i search to increase the line height, or do something with padding, in order for the menu to appear from the begging in the middle, while loading a page?
Thanks!