Paladin Can’t Move or Action

I made a Paladin build based on spamming the Zenith ultimate with the Sermon of Steel modifier, a ton of cooldown reduction, and the Apogeic Furor aspect. Able to do torment 3 with no glyphs equipped, but when spamming Zenith nonstop my character will freeze in place and be unable to attack or move. I am still able to teleport to a town or quit out the game, but this issue happens when Zenith is used a lot like in world bosses or infernal hordes.