Google reCaptcha randomly stopped working

I have a broad number of sites I manage and have set many of the forms with Webflow’s reCaptcha element. When I have first set these up, they have worked fine. But recently, I’ve been made aware some of the forms have started failing to submit. Those sites having the issue, in the Google reCaptcha Admin page there’s a banner stating, “We detected that your site is not verifying reCAPTCHA solutions. This is required for the proper use of reCAPTCHA on your site. Please see our developer site for more information.”

The solution I’ve been using is deleting and creating a new reCaptcha account for the site, getting a new site and secret key to use. Each of these site reCaptchas are v2 Checkbox.

What could the reason be for the reCaptcha to stop working like this?

I have the same issue. All of my sites now have that banner in the console, and have been receiving increasing amounts of spam messaging.

We’re also seeing the same message on all our reCAPTCHAs.