Masthead Animation

Hi, on my website iglobal.net there is an issue with the header which is visible in Chrome browser for both mobile and desktop. It does not occur in Mozilla FF. There is a skipping or animated height adjustment right above the secondary header menu header when switching between pages. For example, from the home page click on the learn more button in the slider and the header will change height during the transition to the new page. Then when you click back to the home page it happens and also when visiting other pages. I contacted the slider plugin developer and he cannot assist as it is not connected with the slider. However, he made the following suggestion: "...your problem seems to be connected to that the height of your #masthead element changes and you have a transition: all .5s ease-in-out; property on it, which will make this change happen with an animation. If you would like to solve this problem, then I would rather suggest getting in touch with the developer of the theme where you menu is coming from." Can you send some CSS code to fix this? Thank you for your assistance. - Edwin