Video is just for proof. Should be easy for Valve, doesn’t look like a big problem. Here is the fix :

  1. In games core settings : No preference
  2. Remove -threads launch option
  3. Taske Manager > Details > steam.exe > Set affinity only on Pcores
  4. Launch the game and be sure is inheriting steam affinity
  5. Profit and wait for Valve fix

    -threads 16+ is like No preference for me.
    Ecores OFF in Bios should have the same effect but I need them for 1100+ Fps in the bench ✌🏽