Strange Viktor W and Fiora Parry interaction

I was dueling a Fiora as Viktor (I know it was a terrible idea, but I didn't do it on purpose) and I put down my W Fiora almost immediately parried, and she was not getting stunned, so the parry was not yellow (Well green in this case since it was the PROJECT skin) Then she continued to stand on my field and stabbed me to death, but she never got stunned I guess that technically means she parried 1-2 stacks that are applied by Viktor's E, but it lasts for a while, so unless she was able to parry the stun (which she definitely didn't) or this interaction is on purpose I think it is a bug since she only parried those 2 stacks, but somehow it counted as her parrying all other future stacks Thanks