FPS drop (144 to 80)

Approximately on May 1 after the update, the FPS began to fall from 144 to 80 at random moments. None of the technical support tips helped me: nothing has changed in the computer and software, the temperatures are fine. Previously, I could stably play 144 at high settings, now I can’t do it even at 720p. I do not need any software from Razor, because i don’t have their devices. Game installed on SSD.
No one helped me on the Russian-speaking forum, although many have a similar problem.

I also noticed a pattern of drops of fps from the map. Example from a training ground: https://yadi.sk/i/eNA5Nnxo0Y59Aw

DxDiag: https://pastebin.com/N1J9X8PR