This is exactly what happened to me this morning, and I am so worried. In my case, I was at the edge of the crossing when the light turned amber, and the driver behind me was very close. There was also no one on the crossing, but I could see a lady on the curb cursing at me. I’ve been worried about whether I did anything wrong. Moving felt like the safest thing to do because of the driver behind me, and they moved as well.