I could use some assistance. We have a SalesForce customer portal and in a number of my orgs, the reset password email is not being sent to the users, either via the Forgot Password link or the Admin Reset Password button in User tab. The Forgot Username email works as expected though. The Forgot Password flow works fine in some of my other orgs and as far as I can tell, all settings are identical.

I have verified in Setup -> Email Administration -> Deliverability that Access Level is set to 'All email'.
In Setup -> Email Administration -> Test Deliverability, I have verified that I receive all 48 test emails.
In Setup -> Communication Templates -> Email Templates -> Forgot Password, I have tried the 'Send Test and Verify Merge Fields' and received the test email.
The Email Log File shows that all forgot password emails are being delivered and received (although they never actually make it to the inbox).

I am not sure if there is an issue with Site.forgotPassword() or if somehow the Forgot Password email template is not mapped properly to the Forgot Password workflow. I do know that the orgs that are having issues have the same managed package as the orgs that are working.  
Not sure where to go from here?

Any help is appreciated.