You marked your answer as a solution but it does not contain the solution. This is misleading and does not help anyone else who is stumbling upon this page experiencing the same issue.To anyone who is still wondering what vendor this mysterious scrip...

Unfortunately, Shopify has removed the ability to turn captchas on/off in the Customer Accounts section of the store settings. This was the only existing workaround for this issue.This needs more attention from the dev team.