For a long time I experiment that and I thought it was a bug but I never hear anything about that anywhere else. When, with my shugoki I do an zone cancelled into gb, sometime it work sometime i just bounce back like it was a wrong timing, either if he take the first hit of the zome atack or he block it and either the hero and the mode, this is totally random when it happen. Is that a bug or I do sometime something wrong with the timing of my cancel?