If you need this professionally fixed or the problem identified you can contact me a firstname.lastname@example.org with details please reference the post url.
Did you recently install/uninstall an app , or attempt to customize your themes code or add code to a theme setting?
Or change something in an app or service, are you using a/b testing service?
If you have done none of those things, and have never changed your themes code try downloading a new version of the theme and checking if the bug is still present.
If you have an older backup version of your theme also check that backups preview.
Looks like this may be related to the logo having invalid html :
If you need this professionally fixed or other problems identified you can contact me a email@example.com with details please reference the post url.
I’ve removed the html from the logo as well.
Are you sure you removed the bad html? Reviewing the reproduction steps the broken html still shows up