Testing microsoft/vscode#133903

• Start RBL in first cell, get several lines in
• Click "Run All" at top of notebook while RBL still in progress in first cell
• 🐛 First cell seems to still be stuck in RBL, while all other cells in the notebook are also trying to run (have the option to stop them)
  • Once I stopped an arbitrary cell in the middle of the notebook, all the cells stopped executing, and RBL stopped in the first cell
  • The output below first cell says "Keyboard Interrupt"
  • I would've expected RBL to stop in first cell (similar to "Continue Execution") and then all other cells to run
  • I've attached the Jupyter output channel logs JupyterRBL9-28.txt