Raiders strange behavior - v0.9.2c

Just now my T2 village was attacked, half a dozen or so, of the raiders, were moving along a dirt road, next to a fence
On the road, there were different goods which the villagers have dropped during the initial attack
The raiders advanced until the first set of goods, then retreat some meters before advancing again. They keep doing this over, and over again, even after the attack on the settlement has concluded
In the end, I have to sent the villagers to kill them because they didn’t stop