Withered set 1 sec rewind and others

Was the mechanics changed for the dawn of light patch? It seems my iron man is no longer able to push back as efficiently as before. Now it acts more like a mini stun than a rewind. And is the frozen set still bugged?

The frozen set (sets in general) are fixed now! And creeps now have an immobilize resistance, that increases when they are stunned/warped/knocked-back and is reduced over time again.