Seeing this too.
Finding that this is becoming a bit of a problem in trying to create missions in the Editor involving MH-9 pickup or drop-offs as it seems to just stop enroute to LZ or after dropping off just hang in the air near LZ forgetting all remaining waypoints.
I tried this in the Editor:
1 - Create a pilot, fireteam and an empty MH-9
2 - Set pilot speed to Full and behaviour Safe and have him board MH-9 (Get In)
3 - Set Fireteam behaviour to Safe and speed Full and Get In MH-9 (synched with pilot 'Load' wpt)
4 - Have pilot fly from southern base to Camp Rogain in North. After Move wpt, place Transport Unload and synch with Fireteam's Get Out. Set another Move wpt for pilot to return to southern base and get out.
This works fine - UNTIL you add Opfor into the mix. Sometimes the team gets dropped off ok, but the pilot remains in a hover near the LZ even after the Fireteam have moved off to next waypoint. Sometimes the pilot never gets all the way to the LZ and hovers somewhere enroute. Sometimes the pilot gets to the LZ and then just hovers there with Fireteam aboard, until shot down.
The KA-60 does not display this behaviour so I can only imagine that the MH-9 is not fully implemented/completed yet. Have tried setting behaviours to 'Careless', experimented with invisible helipads all to no avail.
Hope this will be ironed out once we get to focusing on vehicles more in a later code drop. :)