WaitForCompletion freezes on second run of android build

Calling

WaitForCompletion()

will block indefinitely only on and after the second run of an android build. I can't tell if this is a known issue? I'm about to start reworking my code to work around the problem. Probably using Coroutines and callbacks, but I'm not thrilled about it. Anyone else run into this? I'm calling it from the OnEnabled of a MonoBehaviour that's in the startup scene of my project.

 

Update: I added a delay, with a bit of success. i.e.:

Code (CSharp):

1. public void OnEnable()
2. {
3.     StartCoroutine(DoInit());
4. }
5.  
6. private IEnumerator DoInit() {
7.     yield return new WaitForSeconds(2f);
8.     ......WaitForCompletion();
9. }

So, it works with a 2 second delay. I tried

WaitForSeconds(0.1f)

and it wasn't enough (still locked up).