similar or same issue here - though like what most said, the box consumes a hyena key - unlike the other ones, who graphically stay open.
also realized on the same mission, the weapon crates do the same thing - you open, nothing happens. unsure if this is a "timer" bug, or just bank mission is bugged.
same problem here, hope devs find solution fastOriginally Posted by UbiSailorScout Go to original post
In the meantime I was able to retrieve the blueprint. I followed instructions from a post I read on reddit.
1. Wait for 24 hours before you try to open the box.
2. Play a solo game when trying to open the box as other group members who opened the box less then 24 hours ago might screw your own timer.
I don't know whether the information from step two is actually true however following these steps solved the issue for me.