Not sure what you mean here too much.
Direct focus acts as a forced taunt.
If one of your toons counters an attack they will randomly attack any taunting toon as their counter, not necessarily the toon with direct focus.
So if it is counters, that should explain something.
If yoire talking about it being the start of your turn again and the toon selector is back on one of the other taunting characters but no one has necessarily countered? Still the same thing kinda.
If you simply cant target a toon that has direct focus 'marked' on them then i am going to need pics of a vid because i dont see how that can happen
