Invalid openapi specification

Steps to reproduce

The openapi spec states that a request to /index.php/apps/tables/api/1/tables/{tableId}/rows/simple returns a List of strings.
https://github.com/nextcloud/tables/blob/5cc780ce4260c262e3b733f5cb9d7959a9262938/openapi.json#L3840-L3853
https://github.com/nextcloud/tables/blob/5cc780ce4260c262e3b733f5cb9d7959a9262938/lib/Controller/Api1Controller.php#L1032-L1060

But making an actual request returns a List of List of String|int.

[
  [
    "What",
    "How to do",
    "Ease of use",
    "Done"
  ],
  [
    "Open the tables app",
    "Click on tables icon in the menu bar.",
    5,
    "true"
  ],
  [
    "Add your first row",
    "Just click on \"new row\" and enter some data inside of the form. At the end click on the bottom \"save\".",
    5,
    "false"
  ],
  [
    "Edit a row",
    "Hover the mouse over a row you want to edit. Click on the pen on the right side. Maybe you want to add a \"done\" status to this row.",
    5,
    "false"
  ],
  [
    "Add a new column",
    "You can add, remove and adjust columns as you need it. Click on the three-dot-menu on the upper right of this table and choose \"create column\". Fill in the data you want, at least a title and column type.",
    4,
    "false"
  ],
  [
    "Read the docs",
    "If you want to go through the documentation, this can be found here: https://github.com/nextcloud/tables/wiki",
    3,
    "false"
  ]
]

Expected behavior

The spec correctly mentions that the endpoint returns a nested list.

Actual behavior

The spec differs from the actual behavior, making generated api clients fail.

Tables app version

0.8.0

Browser

N.A.

Client operating system

N.A.

Operating system

Linux (Docker

Web server

None

PHP engine version

PHP 8.2

Database

SQLite

Additional info

I also had type issues on other endpoints but didn't debug all of them for now.
I suspect that this issue is broader than just the one endpoint.