The following vehicles, when set as Simple Objects in Eden Editor, will return to their normal/simulated stated after saveloading the scenario or previewing it and going back to editor. As of now the only bypass of that is to use the BIS_fnc_replaceWithSimpleObject function on them, but this creates a possibility to have some unstable behaviour in MP:

• vn_c_wheeled_m151_01 (+ variants)
• vn_c_car_01_01 (+ variants)
• vn_c_bicycle_01

It's possible there is more than these but I didn't have time to check every vehicle in the DLC.