This bug has been happening a couple of times now, furthermore people really want to report me for abusing it in some way shape or form.
Basically when you use a skill with a time-freeze or awakening while dash xx is hitting you both players get stuck in the weapon hit animation and this results in a barrage of endless unbreakble hits.
(not even the TB player can do something about it it)
Since it requires the opponent to freeze the game at an exact frame, its hard to recreate.
It does look kinda funny and its been happening to some people on other servers too.
Here are some clips of it happening in my streams:
And here is one of it happening in NA (as proof of me not doing something shady):