Azure monitor : Dashboards with Grafana (preview) returned 400 'bad request'

### What happened? Hello, Since 3 days some cells of my Dashboards with Grafana (preview) on Azure Portal return 400 'bad request'. This is what I tested : Create a new cell and copy/past the query -> works, but I don't want to do this manual step for all my cells. Some requests are working while others not on the Azure Portal website (see screenshot). When copy/pasting request that fails in Postman they actually works. <img width="696" height="709" alt="Image" src="https://github.com/user-attachments/assets/ead0334d-07dc-4a34-b313-27809e23ebbf" /> I try to export/import the dashboard to another subscription, problem is remaining <img width="1437" height="616" alt="Image" src="https://github.com/user-attachments/assets/204f2127-1789-4c0a-94cd-f2b65fc815cf" /> Is someone aware of limitation/expiration we have on those type of dashboard ? Or did someone Microsoft push a new Grafana update ? Thank you in advance for your time and response, Léo ### What did you expect to happen? receiving a response to all my requests ### Did this work before? yes ### How do we reproduce it? 1. Create a Dashboards with Grafana (preview) in Azure monitor 2. Setup a cell with a query ### Is the bug inside a dashboard panel? yes ### Environment (with versions)? Grafana: 11 OS: Macos Browser: Chrome ### Grafana platform? Other ### Datasource(s)? Azure Monitor