How do I turn on the setting for the chat bot to automatically open my greeting message?

I noticed on others Drift users pages their greeting message automatically pops up when I visit the page.

I tested out my landing page & my chat bot icon is there but my greeting doesn't pop up automatically.

Where do I turn on this setting?

This is the site I am using it on:

Please test it & let me know if it automatically pops up for you.