Default properties in tableCellProperties are not shown/used by ckeditor

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Description

When I set a 10px default padding for table cells they are not used by the editor (not in Craft or the front end of the site).
However when I open the cell settings it does show "10px" and when I change the value to 11px or 9px I see the padding appearing in Craft and the front end.

Now comes the best part, when I then change the value back to 10px it removes all padding in Craft and in the front end of the website.

Steps to reproduce

1. add table cell default properties to settings
2. add new table (no padding appears even though the settings contain padding)
3. edit a cell to change default set padding
4. padding appears
5. reset to default set padding
6. all padding disappears

Additional info

• Craft version: 5.4.4
• PHP version: 8.3.7
• Database driver & version:
• Plugins & versions: CKEditor 4.3.1

My Json settings:

{
  "alignment": {
    "options": [
      "left",
      "right"
    ]
  },
  "link": {
    "decorators": {
      "openInNewTab": {
        "attributes": {
          "rel": "noopener noreferrer",
          "target": "_blank"
        },
        "label": "Open in new tab",
        "mode": "manual"
      },
      "styleAsButton": {
        "attributes": {
          "class": "button cta-button"
        },
        "label": "Style as button",
        "mode": "manual"
      }
    }
  },
  "table": {
    "contentToolbar": [
      "tableColumn",
      "tableRow",
      "mergeTableCells",
      "tableProperties",
      "tableCellProperties"
    ],
    "tableCellProperties": {
      "defaultProperties": {
        "padding": "10px"
      }
    }
  }
}