I noticed that, at least according to the debuff icons, purge beam fails to apply the scramble affect most of the time you use it.
Usually you just get this:
Only sometimes you get the full range of effects:
Screenshots from a training match in case that's relevant.
Also are the other effects intentional (weapon breaker on self, armor breaker on both self and enemy)? They do not match the tooltip (I know, that doesn't say much) nor other purge effects in the game.