I'm having the same issue. it opens when driving under a silo, but can't get it to open next to a combine. I tried it with a different truck to the Kenworth, and it worked ok, so it must be a keybind conflict of some sort.
I'll have another test over the weekend to confirm this!
I get them to open and clkse perfectly havent had a problem once love these trailers
Everything wors great, must be a mod conflict