SHE3AR76UC/25 Bosch Dishwasher - found part in bottom

[JD Improv]

Model Number

SHE3AR76UC/25

Brand

Bosch

Age

1-5 years

I have a Model SHE3AR76UC/25 DW. After a washing, we found the attached part in the silverware tray. Looked inside and could not see where it came from. Also looked at several parts diagrams on line and I do not see this part. Does anyone know if this is a part that broke or fell off in this model and how to repair it? My wife denies putting anything in the dishwasher which may have had this part break off.

Thanks.