I think there was also another collision bug and that happened only in 1.16.
If you startet a mission and you were transfered to one of the airports (not the FARP), sometimes your helicopter collided with an object at the airport, which resulted in a complete crash. I never made a fix for this, cause it only happened in 1.16 with the much better looking airports and the additional objects that caused this crash. As I wanted to use 1.15.4 further; I only fixed some things for this version.