I&#x27;ve experienced this, and it&#x27;s a major pain the ass if we are talking about not just testing but making it work for AdBlocker users. In our case once we had to resort to <i>rewording</i> the method name in our REST AJAX API endpoint so it wouldn&#x27;t contain the word &quot;counter&quot; for it not to randomly fail for adblocker users. Why would an adblocker be so incredibly aggresive as to block random words from urls is beyond me.