See bug report:
Same issue here, and it caused my purchased helicopter to crash, before I could even click on “Ready to Fly” - Gone. It was bouncing around in the pre-mission screen that gives the details. This happened to me a couple days after launch, and seemed to have disappeared, however, now it seems to happen all the time, with almost every search and rescue with helicopter, some agricultural helicopter missions, and almost every single company helicopter mission. I’m afraid of trying out the new helicopter I grinded for…
If that issue is related to missions then see existing report:
Any news/changes in it? My FS started do bouncing heli today, I also see that planes tries to do the same? Do we know when it will be fixed? it makes my career a mess…
same issue here
Just to add a bit, I have been flying FS24 since day 1. Last night I was flying the H160 around. During the flight I paused everything for a pit stop, came back and un-paused, and immediately the helicopter was bouncing up and down, in the air. Sort of stationary. It would not respond to controls, and I had to use Task Manager to kill the FS24 session. Hmmmm… Go before the flight! 
Same issue is happening to me… Went to load a freelance mission and bounced around and crashed heli before I could hit the start flight button. Now I can’t fly the G2 heli anywhere even free flight, it bounces or lands upside down… Other it seems other helis not affected. Just occurred today for the first time 12/21. Now my career mode is broken lost my reputation for no reason and can’t do freelance
Yep same here just destroyed my reputation (as if I need any help with that)
Same here for me. Ive seen it intermittently in career mode but today all helis are jumping in career or freeflight. All helis including 3rd party.