using API /groups all subgroups are not shown

Using EE 11.1

Expected Behavior

as the owner of a group {Department} then I'd expect to be able to see all subgroups in the {department}

Method and Endpoint

GET: https://gitlab.global.CORP.com/api/v4/groups/DEPT/subgroups?page=1&per_page=100

Using Personal Access Tokens that I created scoped api.

Actual Results

[
    {
        "id": 1895,
        "web_url": "https://gitlab.global.CORP.com/groups/DEPT/teams/devops",
        "name": "devops",
        "path": "devops",
        "description": "",
        "visibility": "public",
        "lfs_enabled": false,
        "avatar_url": null,
        "request_access_enabled": true,
        "full_name": "DEPT / teams / devops",
        "full_path": "DEPT/teams/devops",
        "parent_id": 1559,
        "ldap_cn": null,
        "ldap_access": null
    },
    {
        "id": 1789,
        "web_url": "https://gitlab.global.CORP.com/groups/DEPT/teams/ms-guild",
        "name": "ms-guild",
        "path": "ms-guild",
        "description": "",
        "visibility": "public",
        "lfs_enabled": false,
        "avatar_url": null,
        "request_access_enabled": true,
        "full_name": "DEPT / teams / ms-guild",
        "full_path": "DEPT/teams/ms-guild",
        "parent_id": 1559,
        "ldap_cn": null,
        "ldap_access": null
    },
    {
        "id": 1896,
        "web_url": "https://gitlab.global.CORP.com/groups/DEPT/teams/ops",
        "name": "DEPT Ops",
        "path": "ops",
        "description": "",
        "visibility": "public",
        "lfs_enabled": true,
        "avatar_url": null,
        "request_access_enabled": false,
        "full_name": "DEPT / teams / DEPT Ops",
        "full_path": "DEPT/teams/ops",
        "parent_id": 1559,
        "ldap_cn": null,
        "ldap_access": null
    }
]

Mismatch from Expected and Actual

When I navigate to the /DEPT/TEAMS/ I see more subgroups.

Ops, DevOps, Ms-guild

DarkMatter with visibility: Internal

seniors, uikit-approvers with visibility: private

api api:consistency backend