Raise Zombie of Falling sound bug

Hi
To replicate bug:
Arcanist Brand linked to falling zombies

1. Have 1 brand recall triggered by Automation spell
3. Use Perfect Crime for maximum triggers.
4. Use Montregul grasp for explosions

Pretty quickly after running around killing mobs some of the sounds stop playing related to the zombies, the falling effect and the landing *thud* stop playing.

The sounds work fine if I cast the falling zombie myself but it seems when they are triggered by arcanist brand the sounds break after a while or perhaps it's the brand recall triggering arcanist brand that breaks it, in any case it feels a lot less fun without the sound.