I don't know if this is only a Kensei thing, but I only saw Kenseis do this and it is FCK'N ANNOYING. Please fix this bug.
And here is the video proof:

https://www.youtube.com/watch?v=CmVSsl7ZMHg

If you slow it down at the 15-18 sec you will see that he is going for a guard break and then he changes it to a top light.