Environment Details
-
Platform: Google AI Studio
-
Account Tier: Google AI Pro plan subscriber
-
Model: Nano Banana Pro
-
Interface: Chat/Prompt Playground
Issue Description
When using the Nano Banana Pro model for image generation in a single Google AI Studio chat session, the model successfully generates the first two images. Upon requesting a third image, the session breaks completely and displays a fatal internal error. The accumulated context or image attachments in the chat history cause a session state failure for subsequent image generations.
Steps to Reproduce
- Open Google AI Studio and initiate a completely new chat session.
- Select the Nano Banana Pro model from the model selector drop-down menu.
- Enter a prompt to generate the first image and wait for successful completion.
- Enter a new prompt to generate a second image and wait for successful completion.
- Enter another prompt to generate a third image within the same chat thread.
Expected Behavior
The model successfully generates the third image and appends it to the ongoing chat history alongside the previous two outputs.
Actual Behavior
The generation process fails abruptly. The system displays a red warning banner with the exact text: “Failed to generate content. Please try again. An internal error has occurred.”
Workaround and Diagnostic Notes:
- Refreshing the browser page fails to resolve the corrupted state of that specific chat thread.
- Starting a completely new chat session restores functionality temporarily until the two-image threshold is reached again.
- Deleting the third generated image slot so the total active image count reduces allows you to generate normally without errors.
This pattern points to a backend indexing limitation or a message payload capacity restriction in the chat interface where the system fails to properly process or retain multiple heavy image payloads in one continuous thread.