Autofill Freezes and Malfunctions

I have autofill set on Safari. As I start to type in a form, eg, name, address, email, the small auto fill pops up. I click on it. It turns color, from wihite to blue. And then does nothing more and the autofill screen stays there, on top of the open page. On my screen, not the website page. If I close the page, the blue popup screen reamins. No matter which safari page I go to, the blue popup screen stays on top of the page, frozen in place. I can neither move nor close it. As a result have no benefit from autofill

Thanks.