For instance.
You have a meta object with handle 123-Basic
To query this object, your query should look:
query {
metaobject(handle: {type: "test_metaobject", handle: "123-Basic"}) {
handle
}
}
But it will return no values.
Instead, if you query for 123-basic you will get your object.
On Admin interface the handle remains `123-Basic, so it is not an issue of changing the case on save.