So far I've seen 8 convoys (8 pairs cause they always come in 2) and none of them had any prisoners, and only 2 of those times I saw the prisoners close to the cages and the leave/return tactic didnt work here either? I've looked throught on the internet and only post I've found about this is some guy having the issue 2 years ago, all he did was leave? And return? I don't know what he means by that all I know is if I go too far (like 100m) the convoy despawns, and I've tried leaveing (but staying within 100m range) and returning only to find the cages still empty.

Sometimes I can see the prisoners all bunched up outside the 2 cages all together on the ground but cant interact with any of it, and it kill me on the inside cause its the last thing I need to do to get 100%, now I've still not started episode 3 yet and I've read that same glitch appears there as well. So, I'm trying to get the 100% in all the cities done for the king washington dlc, only problem is the convoys in episode 2 doesnt seem to have any prisoners to free once you get rid of the guards, and I cant open the cages either.

Assassin creed 3 convoy