This happened to me today after two hours of reading this forum.
Thankfully, I didn’t crash into it. I actually intentionally went behind the trailer in an adjacent lane to experiment.
What ended up happening was that my MX would stop with a safe enough distance behind the trailer. Once the car came to a complete stop, however, it would “ignore” the trailer, and then continue straight ahead to the truck.
I made sure that this was this case 3 times. All three times, autopilot was engaged and I disengaged it at the absolute last second to give AP a chance. It would have turned out to be a very similar story.
I hope your MX gets out and back on the road soon.
First pic is of when AP stopped before hitting trailer (safe distance)
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Second pic is of when I waited to slam brakes. Pic was taken once brakes have been pressed, AP disengaged, and passengers frustrated
View attachment 325562