Board Thread:Questions and Answers/@comment-81.83.138.98-20180917220308/@comment-81.83.138.98-20180918174119

I don't think it's a bug. Just the same programmed chance like the regular instant subguard damage. It just happens sometimes and it keeps on happening. So submission guards are only usefull for offensieve fights. In defensieve fights the instant damage will work anyway (without a subguard skill).