A. First, check your payment gateway settings in Lightspeed to ensure they are configured correctly. Look for any duplicate entries or incorrect API keys that may be causing the issue. If necessary, remove and re-add the payment gateway to reset the connection.

B. If the issue persists, consider implementing a manual review process for transactions. This can help catch any double payments before they are processed. Additionally, inform your customers about the issue and provide them with a way to report any double charges they may encounter.