Since 14.0, my friends and I have been having problems dropping items in pickup missions (individual mission, not team).
This is a problem when the item in question happens to be the MO.
First time: could not drop item. Gave to another teammate. They could not drop the MO. Attempted decorating the mission wall with some spare ammo. Could not do so. Someone had to take item, zone, come back, and then could drop it.
Second time: same thing.
3rd time: same thing.
4th time: zoning and camping repeatedly -- could not drop MO.
Mission could not be completed. The "found item" for this one was a nano crystal, which was different from the other times. We also had a teammate disband, but those were the only differences I recall.