Neo4j Graphql: Nested array type generate normal array in CreateInput

Drivers & Stacks GraphQL & GRANDstack
#1

I create this type

 type Block {
    id: ID! @id
    type: BlockType!
    contentTable: [[String]]
}

On the GraphQL documentation playground, the return type shows contentTable: [[String]] correctly but BlockCreateInput just shows contentTable: [String], one level of array disappear. Did I miss something?