Gemini API randomly returns Invalid API key

#### Environment details

  - Programming language: Python
  - OS: Linux Ubuntu
  - Language runtime version:  Python 3.13.2
  - Package version: 1.12.1

#### Steps to reproduce

  1. Just send multiple requests to the API
  2. I am using gemini-3-flash-preview model

Making sure to follow these steps will guarantee the quickest resolution possible.

Thanks!
