I thought that the index would be the same as the textrea's index because it is set in [`core:521`](https://github.com/mightyiam/wymeditor/blob/d7c86ff06b3a8bc3ecab6614ba7591a1ad7500dc/src/wymeditor/core.js#L521), which is supposed to be still synchronous.

I thought that the initialization of WYMeditors is synchronous until the `.load` handler on the iframe. Isn't this so?