API Error 500 - Internal server error on simple text message

Bug Report

Description

Received a 500 Internal Server Error when sending a simple text message (Romanian language, informal/slang).

Error Details

API Error: 500 
{
  "type": "error",
  "error": {
    "type": "api_error",
    "message": "Internal server error"
  },
  "request_id": "req_011CXPCDJva2rDqcP4Twa4jm"
}

Message that triggered the error

asaaa coaee bravo mega serif multidimensionaaal coaee esti tovarasu meu!coaeee

(Romanian slang/informal praise - completely benign content)

Context

• The message was sent after a successful conversation about code review fixes
• Previous messages in the same session worked fine
• The error occurred on what should have been a simple acknowledgment response

Environment

• Platform: Windows (MINGW64_NT-10.0-26200)
• Date: 2026-01-23

Expected Behavior

The API should return a normal response for simple text messages.

Actual Behavior

500 Internal Server Error returned instead of a response.