I believe this bug is beyond the point of calling it potential. It is so annoying that it makes the game unplayable. Anytime an npc interlocks you while you are doing anything that would stop you from using combat skills, game considers that you are continuing doing that action permamently. Blocking all your attack skill use permamently.
For example, an npc attacks makes you fall down, which disables your skill use for a sec or two till your RSI stands up again. If an npc interlocks you while you are standing up you lose. Which means, game will believe your character to be doing something that does not allow skill use untill you restart the game or suicide. When that happens in four consequtive missions, requiring me to suicide before each mission, and finish the mission using only regular attacks, it gets beyond the point of being annoying.
This combined with other NPC exploits like in-and out interlock loop, fighting us beyond walls in protected state, going into perma-EVADE mode and all, makes it a must for all NPC's to be banned from the game forever, **bleep** exploiters. 