Warm is still the best way by far to deal with it, and I never expect that to change. But if you don't have Warm on your team, and no Kuzmann, you're screwed. Definitely seems like a glitch.
I've never beaten the drone without warm or kuz since the patch, except when an antagonist shows up. And I honestly hate that Hans players feel forced to use Warm on objective parts because it is a trash-tier weapon for dealing with enemies and players.