Just wondering if anyone has had the gender prediction at their 20 week ultrasound turn out wrong?

My OB did a scan when I was 18 weeks and said he was pretty sure we were having a girl.

All good, then we went for our 20 week US. The sonographer said 'looks like a scrotum to me'....

Now I have heard that it is more common for a boy to be mistaken as a girl, than it is for a girl to be mistaken as a boy... So I'm thinking that the 'boy' prediction at the 20 week scan is probably most accurate. But still curious to know if anyone was told they were having a boy, only to end up having a girl?

TIA