The "mission loading" / "transferring mission" bug has been plaguing our squad .. well.. as long as I can remember. It seems quite random, not being able to determine exactly what causes it.
As said, it happens suddenly in-flight. Sometimes just after you got airborne, sometimes after hours of continuous flight. Last Sunday squad mate lost a plane to the bug on a SEOW coop after 2 hours of flight, just before starting our bombing run(damnit
).
-LLv34_Untamo