I have this issue to, and it seems there is a fix coming in version 1.3.1.0 of seasons.
Currently only 1.3.0.0 is available on the xBox.

Since i'm not the mod, i can only hope this is quickly resolved.

1.3.1.0 is now only on PC/Mac available.

Hi, i'm also looking for the dev of this mod, i have the same issue with the milkcontainer. Did not record a video of it, but can try it again. Only on the truck so far. The hook-trailer is not yet tried with this. So, it's not a specific issue on a specific map. I was playing (and still am playing)...