missing keys for required, multivalued, annotations during linkml-map transformation for in slots

[Duanoc]

Describe the bug
I tried to convert a schema like below into a new schema using linkml-map basically renaming the attributes.
In the resulting yaml file the tags required, multivalued and annotations are incomplete. Multivalued and required are copied for the tree_root/Class1 class but not for the Class2. Where as annotations are copied for the classes but not for the slots. It this the correct behavior or a bug?

Version of LinkML you are using
linkml_map-0.3.8

Please provide a schema (and if applicable, a data file) that replicates the issue

classes:
  Class1:
    tree_root: true
    annotations:
      key: value
    attributes:
      att1:
        required: true
        multivalued: true
        annotations:
          key: value
      att2:
        range: Class2
        required: true

  Class2:
    attributes:
      att3:
        required: true
        multivalued: true
        annotations:
          key: value
      att4:
        range: Class2
        required: true