main index page is not centering the gallery

recently my main index page has been loading the gallery content to the left instead of centered. I usually have to refresh the page a few times to get it to center. not sure why this is happening. it doesn’t do it to any of the category pages or posts just the index page. and not 100% of the time but a good bit

please any suggestions?

the url is https://www.theteewarehouse.com