Searing Bond of Detonation - massive frame drop during detonation

This started happening more less after I started summoning more than 10 totems in order for them to detonate.

When all totems explode at once - despite the effects not looking demanding when compared to other stuff that's in the game - I experience massive frame drops and screen tearing (despite v-sync).

Seems like an optimization issue.

EDIT: seems to be an issue caused by Defender's Ancestral Totem MTX