How to understand Google reCaptcha Sessions Completed chart
<p>Google reCAPTCHA has two Analytics charts: "<strong>Requests Passed &amp; Failed</strong>" and "<strong>Sessions Completed</strong>". The first one seems to show that there's minimum/no failures with people passing reCAPTCHA, while the second one implies that on some days, <strong>some 90% of attempts to pass reCAPTCHA fail</strong>. </p>

<p>How am I supposed to read/understand these charts? Are my users failing at 90% rate or is all well?</p>

<p><a href="https://i.stack.imgur.com/NZ6GK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NZ6GK.png" alt="reCAPTCHA Analytics"></a></p>