Clicking run every single time

So i’m working on codepen (

I notice how instead of it auto running every time i make a change i have to annoyingly click ‘run’ every time. This isn’t the end of the world, but it was a completely unnecessary change and i cant see what i am doing live. It was more fluent to do it the auto run way, and was quicker.

Settings > Behaviour > Enable auto-updating preview