Seems buggy (surprise surprise haha), need to play around with it more today regarding talisman procs but usually abilities didn't seem to proc of basic, my Samurai would counter, it would say extra turn for his basic kicking in but then wouldn't attack again. And in another scenario with a different character I ran into cases where the counter seemed to get stuck in an infinite loop, the toon kept countering over and over until almost 2 enemies were dead.