I've had it happen twice with the Bison at Grizzly Creek, both times were with the long log cart and at a similar position on the map (on the road between the second garage and the lumber mills, just after the water hazard). Luckily I had the western near with the crane attached to re-load it but I can see this being a serious problem on harder maps!
I've had the med log trailer break loose of the western star, and the hitch regularly shoots sparks on that truck... were all the "lost loads" long logs towed by the star?
i was thinking along the same lines, but not just on the Western Star. if a trailer connection is (too loose) i could see the game thinking it detached and losing a load that way. then again i have never seen or heard of the long trailer detaching. only the medium trailer. either way this is a strange occurrence for sure and hopefully they can figure it out.
Ok i lost a load of long logs (say that repeatedly), and i was not in cabin view so i got to see what caused it. I was going reasonably fast on tarmac, and hit a bump. The front responded a little, but by the time the rear wheels hit the bump, the whole truck whiplashed the rear end into the air, bouncing the logs up out of the carriage. It seemed to me like a reasonably realistic outcome, to be honest. This was with the western star, and long logs with the loader installed. I didn't lose the trailer.
Since we have blockposts it means two reasons - you cant use tarmac with heavy loaded truck, or...this operations is prohibited by state, and we are on blackmarket.
I took first reason and dont use tarmac at all, only with flatbed in sections there you CANT avoid tarmac...so dont speed up))