During the 08/23 test I ran into an interesting situation in Xalanga which I think may be a bug. I decided to go into the Ancestral Lands with absolutely nothing in my pack, just to see what would happen. Whenever I triggered a dust trap I dropped whatever I got as quickly as possible. Then the following happened (this is to the best of my recollection - I wasn't paying a great deal of attention at the time).
I triggered a dust trap and got a Flaming Humbaba.
I dropped the Humbaba and walked a ways away.
Then a JuJu popped up between me and the Humbaba.
It went through its initial threat animation and then started the foot-tapping animation while telling me it was coming for my Humbaba.
But it didn't move (neither did I), it just kept repeating the animation and threat.
Apparently it couldn't see (so to speak) the Humbaba behind it, even though I could. I eventually decided to leave and go to another street, so I have no idea if it eventually picked up the Humbaba. And unfortunately I didn't think to grab a screenshot when it happened. I went back to Xalanga several times in an effort to replicate the situation but was not successful. I did notice that if a dropped item was between me and a JuJu then the JuJu had no trouble seeing it and picking it up. I assume the devs have more control over when and where a JuJu pops up, so they may be able to replicate this more easily than I.
This occurred around midnight Pacific time between 08/24 and 08/25.