Sticky section of website suddenly changed location

I have issue with a sticky panel on my website. It’s changed placement. It looks fine in the designer and on the read only. But the published version isn’t correct.

I’m referring to the “get in touch” section.

See the public website: Events Space Old St | The Lightwell at Techspace Worship Street

Any idea why this has happened? And the fix?

Here is my site Read-Only:
(how to share your site Read-Only link)