**Summary** NotebookLM customers are experiencing an issue where account tiers are being incorrectly downgraded. Affected Ultra & Pro tier users are seeing Free tier features. **Description** We are continuing to investigate an issue with NotebookLM where customers may experience a temporary downgrade in their account tier. Our engineering team has identified a potential root cause related to a recent software update and is currently working on a mitigation plan. We will provide an update by Tuesday, 2026-05-19 20:30 PDT with current details. **Customer Symtomps** Customers may notice lower resource limits (e.g., hitting limits for Studio artifacts, source count per notebook, etc) and the absence of premium features like advanced sharing and analytics. **Workaround** None at this time

**Title** NotebookLM customers may have experienced an issue where all premium account tiers are being incorrectly downgraded to free. **Description** The issue with NotebookLM has been resolved for all affected users as of Tuesday, 2026-05-19 21:04 PDT. From preliminary analysis, the issue was triggered by a recent software update resulting in accounts on premium plans being incorrectly recognized as free accounts. The issue was mitigated by restoring the system to a previous stable state, which successfully reinstated the appropriate service tiers for all affected accounts. We thank you for your patience while we worked on resolving the issue. **Symptoms** Customers may have noticed lower resource limits (e.g., hitting limits for Studio artifacts, source count per notebook, etc) and the absence of premium features like advanced sharing and analytics. **Workaround** None at this time. (Affected: Gemini Notebook)