Using sys_user_has_role table as a created record trigger in Flow

[Brady Gordish]

Hello, I've been asked to find a way to send an automated "welcome" email, with KB articles to a user who has been granted the ITIL role. 

I've been trying to do this, through Flow Designer, by setting the trigger to fire every time a new record is created in sys_user_has_role that has a role of itil. 

So far the flow technically works, but not the way we're wanting. If one were to manually assign the role to a users record, the email fires as intended. This does not work, however, if the role is granted as an inherited role from a group. 

From what I can tell, so long as the inheritance count is empty on the record, it works. If there is any number on the inheritance count, the flow simply does not trigger at all.

Would anyone here happen to have an idea as to why this would be happening and know a way to have a flow trigger when someone inherits the itil role for the FIRST time (last thing I want is for my flow to trigger every single time a user record's inheritance count increases)?

Note: I had also tried setting the condition of the trigger to also include inheritance count is 1, and having it look for both updated and created records. No dice.

[Brady Gordish]

Well, that explains a lot! Though, rather frustrating at the same time. Thank you! Back to the drawing board.