You don't have to specify role when you call through Python (https://cloud.google.com/vertex-ai/generative-ai/docs/start/quickstarts/quickstart-multimodal#gemin

You don't have to specify role when you call through Python (https://cloud.google.com/vertex-ai/generative-ai/docs/start/quickstarts/quickstart-multimodal#gemini-text-and-image-samples-python_genai_sdk https://cloud.google.com/vertex-ai/generative-ai/docs/start/...) (which I think is what you are using but maybe i'm wrong). Feel free to DM me on @chrischo_pm on X. Stuff that you are describing shouldn't happen