Quote Originally Posted by player1
Not an in-game bug.
Since there will never be fathers with such trait.

And if there was by some miracle such father, then son will still never gain it since non-diplomats can't gain diplomatic traits.

So at current state its just oddity in trigger listings.
So a bug is only what you addressed in the bug fixer, otherwise it is an oddity. I thought you were looking for feedback. My mistake.