Sound stuttering with molten strike

I'm currently playing my molten strike champion build. Recently I noticed a problem with sound. When attacking large group of enemies with molten strike + ancestral call and high attack speed the sound starts to stutter. After killing them it goes back to normal. Only ingame sounds stutter. I checked everything. Uninstalled nvidia hd audio and disabled reverb in poe settings. Only channel count set from medium to high helped a little bit.

It's ambient and additive ranging sound from waterfalls or water [like the sewers] that causes this when you approach them. Sometimes it's other things of that sort, but I don't recall which ones that do it.