Update: checkout_completed was firing for me today

I was testing by submitting real orders in incognito mode and using Chrome's JS debugger. All events were firing their subscriptions except for checkout_completed.

checkout_completed isn't firing for me. I'm actually a shop admin trying to subscribe to the event using the "Customer Events" feature in the Shopify admin. I'm not having trouble with any other event not firing my handler. I tried stepping through t...