NIPT Test wrong ?

Hi ladies,

Has anyone heard of or ever had a NIPT test be wrong? I saw something on YouTube of ONE family who were told they were having a girl but it really was a boy and the lab didn’t have a real explanation as to why the results were wrong. I know they say it’s “99%” accurate… yea yea but mistakes happen 🤷🏽‍♀️ I’m just curious if anyone has experienced this or knows someone who has.