While in Combat, and using Lashing Tail kick, the monk gets stuck in slow motion. Very slow motion. The monsters around me are not in slow motion, they are attacking at normal speed. 4 times now I have experienced it, and it does not go away. I quit the game and start a new one, about 1 minute into the rift, slow Mo kicks in and it is unplayable.
Getting hit increases your armor by 50%, but reduces your movement speed by 15% and attack speed by 20%. This effect stacks up to 5 times.
I’m betting you have those equipped or in the Cube and, if so, this is not a bug.