Helicopter FPS Drastically drop when switching mission task

Do you have the same issue if you follow the OP’s steps to reproduce it?
• Yes

Provide extra information to complete the original description of the issue:
• As soon as the cargo isoff the ground and one should start the flight towards the dropzone the stutters begin and the flightdistance to the dropzone suddenly is 3400-ish miles away instead of the number it used to be according to the job description.

If relevant, provide additional screenshots/video:
• Not needed