```json
{
    "participants": [
      {
        "el_client_type": "geth",
        "el_client_image": "ethpandaops/geth:lightclient-devnet-8-edf4ab3",
        "cl_client_type": "lighthouse",
        "cl_client_image": "sigp/lighthouse:deneb",
        "count": 1
      },
      {
        "el_client_type": "geth",
        "el_client_image": "ethpandaops/geth:lightclient-devnet-8-edf4ab3",
        "cl_client_type": "teku",
        "cl_client_image": "consensys/teku:develop",
        "count": 3
      }
    ]
  }
```

Sample input would misbehave before this fix