FSD is not an ambiturner

I'm currently on a little camping trip vacation with my kids. Today I was driving with FSD on (HW4 MY). The road I was on was coming to a dead end, and according to the map I needed to turn left. As I was approaching the end, the navigation voice also says, "In one thousand feet, turn left onto Pinellas Bayway". Then the car puts on its right turn signal and gets into a right turn only lane. Literally as the voice is saying, "Now turn left onto Pinellas Bayway", the wheel is turning to the right and the car executes a right turn. It then drives a short distance and makes a u-turn and carries on like normal. I've seen a few errors where it thinks it needs to make three right turns instead of a single left turn due to odd map issues. But I've never seen the car physically do the opposite of what both the map and the voice are indicating before.