Why does graphql return 500 for querying non-exising field?

[jamestran1]

Why does graphql return 500 for querying non-existing field?

The issue is if I query with non-existing field, the graphql returns 500, but on my perspective I think it should be 4xx for non-existing field or the resource is not found, e.g

query myQuery{
  Person {
     Name
     Type // not existing
     ...Education // not existing 
  }
}