ReCAPTCHA v3: Lots of false positives this past week

In the past week, I've had three different sites experience ReCAPTCHA v3 false positives after previously having had none.

This also reveals another issue - when ReCAPTCHA v3 fails, depending on the configuration the visitor may or may not see an error message, but it's not actionable in any way - e.g. there's no fallback CAPTCHA.

I don't have any steps to take right now, but I'm starting this conversation because I presume others are seeing the same.