light storm
As the title says, there's simply no audio accompanying the MVP animation, only the actual theme itself. I'd assume there should be some slashing SFX or at least a voice line, but it's just completely quiet. I've encountered this in more than one session as well.
I'm not sure if it is needed, but here is my most recent log of the game, taken right after an instance I had this occur.
umbral pasture
Yup, same for me.
next horizon
yeah happening same with gamer juliette skin