Realtime GI emission change with coroutines

Hi,

I've been trying to change GI emission using coroutines. It appears only the last yield is taken into account.
Here is an example :

Code (CSharp):

1. SetEmission(1);
2. yield return new WaitForSeconds(0.5f);
3. SetEmission(0);
4. yield return new WaitForSeconds(0.5f);
5. SetEmission(3);

The result is that, the moment the coroutine is called, emission will be immediately set to 3 and all the instructions above the last yield are ignored.
I threw in some debug.Logs to ensure the coroutine is executed properly, and it is. All the WaitForSeconds are respected.

I use DynamicGI.SetEmissive to set the emission, and it works fine, but coupled with coroutines, this problem arises.