We have enabled Bot Detection using the Simple CAPTCHA in our environment recently.
I am curious to see if we can look in the logs to see how many users may be failing the CAPTCHA to see what impact it is having. I can’t seem to find anything specific to failed logins related to CAPTCHA failing.
Unfortunately, there is not a log for failed simple CAPTCHA at this time. It looks like if you are using Google reCAPTCHA, data is tracked for this via the Google Developer Console. It would be great to collect information about your use case in a feature request for our product team to evaluate: