Unable to open task item in new experience *_000

Troy Rowlands 

It seems that I have somehow managed to "fix" this.

First you need to rightclick any element in the list and click "Open". The list item will open under a url like "https://<url of your sharepoint site>/Lists/<name of your list>/Post.aspx?List=<id of your list>&ID=<id of your list item>" ...

Copy the italic part of the url and merge the infos into this json formatting to the first operand :

{
    "elmType": "a",
    "txtContent": "@currentField",
    "attributes": {
      "target": "_blank",
      "href": {
        "operator": "+",
        "operands": [
          "https://<url of your sharepoint site>/Lists/<name of your list>/Post.aspx?List=<id of your list>&ID=",
          "[$ID]"
        ]
      }
    },
    "style": {
      "text-decoration": "underline",
      "align": "center"
    }
}

Now go back to your list and click the down arrow of your title column and go to "Column settings" > "Format this column". Switch to advanced mode and paste that json formatting.

This worked for me. It now shows the correct title and a click opens the item.