SAAS: Refreshing a lexical editor connected to a runtime and including a jupyter cell breaks saas

See https://github.com/datalayer/vscode-datalayer/issues/32


<img width="1352" height="738" alt="Image" src="https://github.com/user-attachments/assets/09a7d8ac-0697-4df9-89dd-c0b30177bada" />



