Assassinate doesn't provide bonus souls if mystic reverb kills it

[Kelooksoa]

Vindicta ult gives bonus souls on kill, you can imbue it with mystic reverb to cause the target to take damage twice but it doesn't give you the bonus 850/250 souls.
Feels like a bug

 

[Lagaum]

Vindicta ult gives bonus souls on kill, you can imbue it with mystic reverb to cause the target to take damage twice but it doesn't give you the bonus 850/250 souls.
Feels like a bug

I mean it kinda makes sense. The bonus souls if for killing with your ult. Mystic reverb doesn’t count as the ult, it is another source of damage that is calculated based on the imbued skill’s damage.