### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### What happened?

Greetings LiteLLM Team,

## [Quick Summary]

When i use Bedrock Passthrough Endpoint (Link: https://docs.litellm.ai/docs/pass_through/bedrock#1-using-configyaml-recommended-for-model-endpoints) I have configured `s3` and `Custom Callback API` and on both i do not have the actual `message` payload showing (system, tools and user) rather in the S3 object i see the data as ``` "messages": [ { "role": "user", "content": "default-message-value" } ], ``` and on the API endpoint.

## My LiteLLM Setup

### .env

```bash #========[Docker & Docker Compose]======= COMPOSE_PROJECT_NAME=litellm-stack STACK_PREFIX=litellm-stack

# =====[LiteLLM]============

# LiteLLM Container & Volume Names LITELLM_APP_CONTAINER_NAME=litellm-app LITELLM_DB_CONTAINER_NAME=litellm-db LITELLM_POSTGRES_VOLUME_NAME=litellm_postgres_data

# Postgres superuser (bootstrap admin — do not use in app connection strings) POSTGRES_ADMIN_USER=postgres_admin_user POSTGRES_ADMIN_PASSWORD=p0ostresA@dmin123

# LiteLLM app user (least-privileg…