Data Action POST returning 502 during JMeter ramp-up

NICE CXone API & Integrations
1

Need some help troubleshooting… The custom Data Action integration hits a 502 Bad Gateway error via the Architect flow when JMeter threads exceed 10. Running JMeter 5.6.2 from Singapore against the /api/v2/integrations/data-actions endpoint. Payload below:

{
 "integrationId": "12345678-1234-1234-1234-123456789012",
 "input": {
 "customerId": "CUST_001",
 "actionType": "UPDATE"
 }
}

Single thread works fine. 10+ threads fail instantly.