I feel like the caches in the nuhoch area aren’t even on a 24 hour timer, its been a couple days now and I have noticed they are all opened still in that area, I went and opened some in another area in case there was a mechanic where only a certain amount are not opened in the zone at a time, but I went back and they are still opened. I was thinking the same thing as someone else, you need an item from them for an achievement (which is really nasty to get, all the chak weapons) so I figured I would just opened caches there instead of other ones since it was the only 1 of the 4 i still needed.