groups label got overritten by type text

Hi, i'm facing following problem:

I'm trying to develope a new Content Type and in my semantic.json I want to use a group and in the group I use two text types.

It does't matter if I use widgets for the text type or not. Whenever I put more than one field inside a group and one of them is a text the first text field overrides the label of the group.

Here my semantics.json:

[
  {
    "name": "question",
    "type": "group",
    "label": "Question",
    "fields": [
      {
        "name": "textone",
        "type": "text",
        "label": "Question Text",
        "description": "Question Text"
     
      }, {
        "name": "texttwo",
        "type": "text",
        "label": "Additional Text",
        "description": "Additional Text"
      }
      
    ]
  }
]

Am i doing something wrong or is this a bug?