Closing help options with 'X' causes cancel of form

If I open the admin user edit page and change a field then click on help icon then click on the 'X' to close it I get the 'This page is asking you to confirm that you want to leave - data you have entered may not be saved.' message indicating to me that it is trying to submit the form.

If I don't change a form value the clicking on 'X' looks to reload the page, so looks to be doing the form 'cancel' option.

If I do this on the Institution edit page (where I first noticed it) it cancels the form and takes me to the institution list page.

I note that if I click on a help icon then click outside the help box it disappears and nothing bad happens, so this issue is only if the 'X' is clicked