We have been playing MD on the switch for several hours this evening... and we haven't been able to complete a single mission. We tried 2 x nether dives, then a standard mission and then one more nether dive. Each one crashed, causing a screen freeze. The only way we could escape was to go back to the switch's Home Screen and force close the application. 

Initially we thought that it might be to do with the weapons we were using... but one of us swapped out and we have had the same issue. No missions count as completed