I’ve been noticing since the patch and even before that some abilities are bugged. Sometimes Sang Feng’s counter doesn’t get triggered by attacks, Viola’s ult doesn’t work on enemies sometimes, sleep or mortal wound, and Silvernail’s ult doesn’t stun heroes if you hit them into his A sometimes, they just fly past it. These are a few, but I can only guess that there are more. Just giving people a heads up that some abilities are badly bugged this patch.