Performing a heavy doesn't remove the Flux Dispersal Charges in AQ Map 8 66-75% of the time.
As you can see, Hit Monkey has 20 Flux Dispersal Charges on him. Performing a Heavy should remove them. In this clip, performing two Heavies does not. I stopped recording after the third Heavy removed the Charges, but later on in the same fight, it took five attempts for the Heavy to remove the Charges.
Video:
https://www.youtube.com/watch?v=FwFhDlhVlUU