The exploding ice has been a feature. In fact there has been exploding stuff on all the maps. I think it adds fun, but most do not agree with me.
So far we have not got answers about both issued raised in your vids, they have been reported from the very beginning.
I actually asked if it was a feature or a glitch that unpacking the cargo allows it to move through the trees.
I did not get any answer.
I have observed on all the SCS Games, Spintires, MudRunner, ETS & American Truck Simulator a phenomenon where on can drive an over-sized vehicle through a narrow gap driving in first person and one will mostly get through ~ however, use 2nd person view and one will ALWAYS get stuck, look at it and get stuck, just drive blindly and you go through most of the time.
Worth discussing. BTW, there are two other routes to take the aircraft, longer but easier and I used a big crane to lift the aircraft off the trailer, move the trailer forward and drive the crane nearer and reload the Aircraft Parts.
It was infact whilst doing this that I discovered and reported the phenomenon. The game has gone live with no change the way it works, but we never did get an answer to this and one can use the test maps and experiment with big trailers to test my reports.
Assuming you've played from the beginning, you'll have missed this phenomenon with all the big, special cargo trailers.