Intermittent Code Runner Behavior

I've been using the Code Runner extension to run small snippets/files of code. In addition I'm using the esm package to patch node, so I can work with ES6 modules. This has all worked smoothly for sometime.

Today however is another story. Running snippets/files was working fine in the AM and then it started acting weird. Now running a code snippet that ran fine before results in a cursor that just sits there or else jumps down a number of lines, without showing any console.log results in the terminal.

I'm running the latest VSCode under Windows 10 Pro version 1809.

I've tried dis/enabling Code Runner. This resulted in it working again but then it dies again. At this point I do not know what to do. Hopefully there is some solution to this complete frustration!