I've been doing that with DK for quite some time now and haven't run into a crash from it. If it was something added in his recent buffs, maybe I just haven't been playing him enough recently, but if it is something from a while ago, I haven't seen it be the cause.
Are you using any special skins on him?
Is the crash at the start of him doing it, middle, or end of the animation, or is it when it is trying to hit the result screen?
Or could it be him doing it, then trying to cancel it into itself?