Coroutine execution not continuing [Solved]

I set up a very simple coroutine which pauses at the first yield return null, but it never gets going again.

 void Start() {
     // Other stuff
     StartCoroutine(RefreshAreas());
 }
 
 IEnumerator RefreshAreas() {
     Debug.Log("RefreshAreas() started."); // I see this in the console
 
     yield return null;
 
     Debug.Log("RefreshAreas() continued."); // This never happens
 }

I do have the object set to start early in the script execution order, but I didn't think this would change anything. I've also tried yield return new WaitForEndOfFrame() and yield return new WaitForSeconds(1.0) and the second log message still never appears in the console.

What am I doing wrong, how do I get the rest of the function to execute?