Power doesn't drop In Horde anymore?

So I just played a few waves custom on my own with Jack, after Wave 10 the enemies stopped dropping any power, none of them left power on the field, the only way I could get more power was using the forge melting weapons…

One of my todays 2 Star Objective is to accumulate 22.500 Power…

Also I was unable to damage one of the pouncers as Jack in Wave 10 he was stunned but the energy didn’t get down at all.