if I may try an explanation of my own....
In a previous message,when he decided to tell us about the filter issues, Luthier said that they indeed began changing some effects in the code trying to make them less prone to induce epileptic seizures.
If I remember correctly, he mentioned the prop effects has being changed forever and few others also....It was a bigger job than they taught and then decided that they would put a overall filter...What we could conclude is even if we turn the filter off, some initial and original effects are gone and COD is not 100 per cent what we were supposed to get...Is it true for the Russian version also ?
Luthier only could tell us at this point..

salute!