Title says it all. Almost all shots/melee attacks miss (it says "missed"). However there are no error messages whatsoever in the log.

As an example, I just had the following scenario:
4 of my pawns were busy brawling with a single ancient soldier. His melee-lvl was 6, he had no armor, only hediffs were go-juice and a power arm. One of my pawns was able to hit the raider once, all other attacks missed.

Meanwhile my healthy lvl 12 shooter took a pump-action shotgun and fired 45(!) rounds at the raiders back from 2 tiles distance. All shots but one missed.

The area was lit up, there were no obstacles in the way.

I have played hundreds of hours with CE enabled. I can say with certainty that this is not normal.