FPS drop and microstutters on DX11 after 1.5

I’m having this problem too since the patch dropped. It’s happened in two of the three games I’ve played today. If it helps, I was playing the mission with Skarik Spinemanglr both times it happened, facing off against skaven about half way through the map. I was playing as mercenary kruber with the executioner sword. Not sure if any of that is relevant though.