Header information is jumbled at loading, must refresh

Site URL: https://www.empoweringcongregations.org/spring-2021-registration

When I load the pages on my website, oftentimes the header information appears jumbled.  When I refresh the page, it looks correct.  Any idea how to fix this issue?

Hi. This appears on many sites. You can contact Squarespace Customer Care (Email/Livechat)