Luckily, installing reCAPTCHA 3 is a free and easy solution that has, so far, solved the problem for me.
Here's a quick video on how you can setup, install, and even hide the little badge for reCAPTCHA on your Elementor Pro forms.
To create your site keys, visit https://www.google.com/recaptcha/
Inside the video I also mention a few little bits and pieces there are helpful....
It was brought to our attention that if you hide the reCAPTCHA and a user cannot be authenticated it will not let them submit forms— even if it's a real human. I was able to replicate this by trying to fill in a form on a mobile connection while using an incognito window. That may be an edge case— but be cautious that you could be stopping people from being able to use your form.
To hide the reCAPTCHA badge, just pop this bit of code into your additional CSS inside your customizer (or wherever you like to throw in CSS)