Below is the saved game file taken just before the quadbike disappears from cargo. From that save point, I pass through the CSAT checkpoint and just after passing the CSAT checkpoint, the quadbike disappears from cargo.

^ Forum thread on issue.

I was just about to make a ticket about this issue. Sad to see this bug has been around since 1.72 (over a year now) but hasn't been officially acknowledged yet.

I've recently noticed that if you enter splendid camera and move the camera close to the falling vehicle, you can hear a continuous driving sound effect which is odd and may have a link to the source of the bug.

I brought this issue up on the forums as well on 1st April and the post seemed to get a lot of support (https://forums.bohemia.net/forums/topic/143930-general-discussion-dev-branch/?page=970&tab=comments#comment-3280362). This feature request would solve a lot of frustration.

I've been getting this crash and error mutliple times while playing one of the new Tac-Ops missions for the DLC. I haven't been running any mods other than some Steam Workshop community produced scenarios (which shouldn't have any effect on playing a BI produced scenario). I've got an error report saved if you need it.

In T119942#1502228, @TheMasterofBlubb wrote:

Actually cannot confirm . Im flying with a hotas set (stick and torque control). My rate of successfull auto rot is about the same as with others exceot huron and mohawk, they are easier.

Yeah, as an issue it definitely ranks low on importance compared to other issues. However, I figured it's still worth identifying since it's clearly not an intended "feature" by the developers.

Maybe I've been swimming incorrectly IRL all this time then.

I agree that this needs fixing, it can be very counter-intuitive when shooting a weapon with a low muzzle velocity like the ASP-1 while while leaning (weapon is canted) and the bullet still magically flies in a perfect vertical arch when it shouldn't.