Dead archers shooting at targets they blatantly shouldn't be able to see from behind terrain features. In the several occasions this happened, the enemy archers were able to fire at moving Cav at the outside of what a max range archer could hit, long before any contact was made visually. The angles involved also made me question whether they were shooting through terrain to hit my troops.
If there is someway to make a video of it I'll gladly do it.