• Open the Titanic.ipynb
• Scroll halfway down, on some cell run "Run all cells above" then click the RBL button right away
• I expect to enter RBL mode once the other cells finish executing

The execution would be queued, but we probably attach a debugger at the moment the cell is clicked, and it makes something weird happen.

The error notifications come from the python extension:

https://github.dev/microsoft/vscode-python/blob/49dc58c3c5c4989245a7354aeb362732cb379fa8/src/client/debugger/extension/hooks/childProcessAttachService.ts#L37

Why is the python extension trying to attach? Why is it stuck showing notifications forever? Is it supposed to be involved for some reason? @IanMatthewHuff @DonJayamanne @DavidKutu @karthiknadig does anyone know?