Use same form multiple times on the same page

I have a Newsletter form in my website footer that is submitted as expected on most pages. On one page the Newsletter form is also used in the page content itself, where the form also works correctly. However, on that page the form in the footer stops working. When clicking on submit, nothing happens – the button stays disabled and the form is never submitted. In my opinion it is a very normal use case to have a Newsletter form both in the page content and the footer, and I expected this to work out-of-the-box. Am I missing something?