Saving Notebook clears "Kernel Busy" status from the page and titlebar · Issue #3658 · ipython/ipython · GitHub
Zero active kernels. In the browser, it says "Kernel Busy" all the time · Issue #808 · jupyter/notebook · GitHub
![Kernel stops responding if the kernel is reconnected during code execution · Issue #2633 · jupyter/notebook · GitHub Kernel stops responding if the kernel is reconnected during code execution · Issue #2633 · jupyter/notebook · GitHub](https://user-images.githubusercontent.com/12250108/27859528-51cc2fc6-6179-11e7-8f6c-9ebce96131d9.png)
Kernel stops responding if the kernel is reconnected during code execution · Issue #2633 · jupyter/notebook · GitHub
![Notebook Kernel in busy state is not connected correctly after refreshing the page · Issue #9010 · jupyterlab/jupyterlab · GitHub Notebook Kernel in busy state is not connected correctly after refreshing the page · Issue #9010 · jupyterlab/jupyterlab · GitHub](https://user-images.githubusercontent.com/192614/96334975-9259e300-1029-11eb-82f6-0e37a8b1a28b.png)
Notebook Kernel in busy state is not connected correctly after refreshing the page · Issue #9010 · jupyterlab/jupyterlab · GitHub
![Unsave indicator confused with "Kernel busy" indicator · Issue #4304 · jupyterlab/jupyterlab · GitHub Unsave indicator confused with "Kernel busy" indicator · Issue #4304 · jupyterlab/jupyterlab · GitHub](https://user-images.githubusercontent.com/335567/39885692-17e91974-5442-11e8-97e7-2178f1453240.png)
Unsave indicator confused with "Kernel busy" indicator · Issue #4304 · jupyterlab/jupyterlab · GitHub
![Successfully executed cells get stuck in busy state until notebook finishes its run · Issue #4334 · jupyter/notebook · GitHub Successfully executed cells get stuck in busy state until notebook finishes its run · Issue #4334 · jupyter/notebook · GitHub](https://user-images.githubusercontent.com/10676103/50939418-a1ae0480-1431-11e9-82e1-eaf544e5f7db.png)
Successfully executed cells get stuck in busy state until notebook finishes its run · Issue #4334 · jupyter/notebook · GitHub
![python - Why does jupyter notebook server keeps crashing when .ipynb files are opened? - Stack Overflow python - Why does jupyter notebook server keeps crashing when .ipynb files are opened? - Stack Overflow](https://i.stack.imgur.com/KEQex.png)