Can't reload captcha on the contact form

[sawks]

A user reported this issue and I've been able to recreate it myself

The contact form on our website here: https://website.org/contact requires you to type in some text from an obscured image to prove you aren't a robot.

The text is quite hard to read and there is no way to get a different option to try.

I'd expect there to be a clearly labelled refresh button that would reload the captcha text.

I'm using Chrome v94 on a Mac but the problem is common to other browsers and devices.