Agent Scripting API 429 errors during JMeter ramp-up

General Discussion
1

Just noticed that the Agent Scripting endpoint returns HTTP 429 Too Many Requests when JMeter 5.6 hits 50 req/s in US1. The standard flow works fine at lower concurrency. The error happens immediately after the ramp-up phase. Is there a specific rate limit for this endpoint? Here is the payload:

{
 "scriptId": "script-123",
 "agentId": "agent-456",
 "interactionId": "inter-789"
}