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White bar and text 'Contact form' appearing at the top of published site

My site is displaying a white bar at the top of the page with the text ‘Contact form’. Image attached.
This is only recent. It doesn’t exist on the Editor, only on the published pages of my site (all of them). Consistent on Chrome and Safari.
Any ideas?
Screen Shot 2020-10-15 at 12.33.35 pm

Here is my site Read-Only: