I am seeing this as well.
I'm sending out a strike aircraft which is within the normal distance. Upon take off, the STATUS of the aircraft immediately is shown as RTB (Mission Over) yet it has barely left the base. Although the flight path is displayed, it continues on toward the target, yet NEVER rises above 3000 feet. After 8 minutes, it turns around and returns to the base as it has reached BINGO fuel.
IMPORTANT NOTE: You can MANUALLY go into UNIT mode and change it to 36,000 feet, but that change can not be made through the Flight. But, even though you change the altitude, the Mission is still listed as being over.
What's odd is that another strike package, with similar aircraft/weapons/target works fine.