Freight Elevators at outposts are breaking. You can tell a freight elevator is broken, if when you access the terminal, it endlessly buffers saying "loading contents" and never actually lets you into the inventory. This issue has hit the gold mining outposts first because of the high traffic, but it's beginning to spread to other outposts. I visited a research outpost today that had two of the three freight elevators broken. It may not be universal across servers, but I had much difficulty finding a server where the gold mining outpost had working freight elevators.
I don't know how fast this issue will spread, because I don't know the underlying cause. I suspect it has to do with cargo boxes sticking around after already being submitting. Many times I have opened a closed freight to see random boxes that have to be moved, and I've even seen boxes that I personally submitted in a mission still there when I call the elevator again. Combine that with the issues of cargo boxes glitching through the ground/floor and it's easy for me to see how the cargo elevators might be breaking.
I don't think this issue will resolve itself on its own. The freight elevators will probably remain broken until some kind of server reset, and the issue will continue to pop up until the the underlying cause has been dealt with. whatever that may be. Honestly, this makes me wary of doing cargo missions, because eventually I'll get a set of missions that I can't finish because all the cargo elevators at the origin or destination will be broken and I'll have to take the reputation penalty.