I’m not really sure what happened this time around, but I had two “Provide Ships” missions which had completed. When I clicked “OK” or “Complete” or whatever appears (I don’t recall now), the log said “Mission Canceled” or similar, and I got something like a 40K reward, instead of whatever the payout was supposed to be. It happened on my last two missions, within about 2 minutes of each other. If it happens again, I will try to get screenshots.
“There is no such thing as a foolproof system. Someone will make a better fool, tomorrow.” @LoneWolffe