It’s not an exception really. Angelborn and demonborn can’t tell which desires or dreads are theirs and which are external but they are often still aware academically they they do experience other people’s desires or whatever.
I see probing as say an angelborn deliberately trying to quiet their own mind and desires as much as possible, like in a meditative way because by ‘dampening’ that signal they’ll get a clearer signal from others and the internal can represent more complex wants or fears etc that might be disceranable in that way.
Functionally though it still works the same, the angelborn just wants what the target wants and they still don’t know if their attempt actually succeeded or it’s their own projections/imaginings.