I just started using Notebooks in ArcGIS Online and I have created/saved my first notebook - it is a work in progress. While working in it, the kernel disconnects frequently - roughly every 10 minutes or so. When this happens I get the standard error message that the kernel has been disconnected and that I should restart the kernel. None of the kernel restart buttons that are available have ever restarted the kernel, it just remains disconnected. My only recourse, that I know of, is to refresh the browser tab for my Notebook, and when it loads again the kernel is active/idle.
There must be a way to get the kernel to remain connected, right?