This error seems to have passed away by the developers.
With update 2.0, the developers of Cyberpunk 2077 tried to be what it should have been: with chases, a dispersed perk system and normal police. There are actually a lot of changes, but some errors remain.
And here’s another story.
Here’s a video showing a bug, recorded at the end of 2020 shortly after the game was released.
It’s difficult to guess why the developers of Cyberpunk 2077 haven’t corrected the behavior of severed heads.
That’s pretty interesting.