Do non-dot debuffs stack?

HokieFiend

I'm talking about speed down in particular. If I have 2 toons that can apply speed down, do those effects stack on top of each other? Or once an enemy has one speed down debuff that's it and they cannot be slowed any further? There can only be one speed down icon on an enemy so my guess is that once they have speed down, that's it.... but was curious if they can be slowed even further despite there only being one speed down icon.

Mandalorian_R3solve

no