Loss of a twin at 9 weeks 5 days

Has anyone else lost a twin but not known until their scan as there was no symptoms whatsoever?? Me and my partner had found out last week that one of our Twins had sadly passed but had no explanation of this the sonographer just acted like it was a normal thing and acted like it wasn't a baby I am disgusted by it! Has anyone else been through this? We had previously been for 3 scans and everything was perfect. Thanks for reading