Yamato's Power slash causes massive fps drop/freeze

[Borrna]

Whenever Power slash is casted my fps drops heavily
It goes from 80-90 to 50-30 fps (it's worse in matches), sometimes fps drop lasts for a few seconds after the ability is casted.
specs:
Intel Core i7-10750H
Nvidia Gtx 1650 Ti (Mobile)
16 GB 2933 MT/s ram