[Gameplay] Darius loses control of movement when using abilities against Quinn

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While playing ranked as Quinn vs Darius toplane Darius lost the ability to control his character's movement instead only being able to follow me. This happened three times but the software I was using wasn't able to record the first instance which resulted in a first blood. This happened twice more and I was unable to nail down what caused it except abilities were used and Darius was unable to stop himself. He was able to use abilities while he was in this state and later said that if he attempted to recall that it would stop the effect. I don't know how to replicate the effect further or anything else about the effect.