emails not sent on expiration after update to 4.6

Ok, i found the problem and the temporary solution to it.

wp_mail() is not working properly on 4.6.
You can read more on the problem here:
Info

And here’s the temporary solution:
Hotfix

Thank you for tracking down the issue.

I installed the plugin but not notifications work with wordpress 4.6.2.
Solution?

I installed the plugin but not notifications work with wordpress 4.6.1.
Solution?