Other than Assassination and basic delivery, are any missions working? Seriously, I am not going for sarcasm here.
I cannot rescue. I cannot follow anyone down using their wakes. Multi stages don't disclose legality of goods or landing pad info...
Even assassination can be flaky. I took one last night to kill a pirate lord, per the mission description. I went to the system and found the target and started to follow him, but he flew (low wake) in to the sun. I couldn't follow, unless I wanted to immediately cook my ship. That was not the worst of it. I stayed in the system, hoping the game would re-spawn him. It did, so I interdicted...which is when I gained a fine and became wanted because he was 'clean'. Whelp, I killed him anyway, since it showed him as mission target. The bounty, which usually for a pirate lord is like 200K, was 400 credits. Yay. At least I completed the mission, even if it made me wanted and only got me 400 credits instead of 200K.
But, yes, the UPS delivery type missions work, the 'go fetch' commodities from a market somewhere missions work, the downed pilot rescue works if you do it right away and really fast, the 'scan thingy attached to another thingy' usually work, but not always.
Also, the take secret stuff somewhere but don't get scanned works, if the system doesn't spawn a cop on top of you immediately when you come out of or enter of super cruise.
The 'go fetch' missions on planet surface also works, but watch out if you are doing them for gaining influence for a minor faction, as they will give negative influence instead of positive.