I passed 3 weeks ago and hit the curb as well, while doing the reverse around the corner. I just corrected myself immediately and positioned myself correctly.
Was shocked that I passed as I'd been told its a wrap as soon as you touch the curb. Examiner said how it's only if you mount the curb, but because I just touched it and corrected myself straight away it was cool.
Guy was overly safe tbh might of failed if I had another examiner.