TypeError: Expected features to be of type Feature[], but received Feature[] | "SendTransaction"

[liketurbo]

I am trying to parse the payload of WalletEvent, specifically ConnectEventSuccess.
In the futures of DeviceInfo, I received [ "SendTransaction", { "name": "SendTransaction", "maxMessages": 4 } ], when I expected a plain Feature[] type.
Can you confirm if this is intended, or if it is a bug? In the specification, you left a comment saying:

// Currently there is only one feature -- 'SendTransaction'

Does this mean that the features type is actually Features[] | "SendTransaction"?

Here's the full response:

{
  "id": 65,
  "event": "connect",
  "payload": {
    "items": [
      {
        "name": "ton_addr",
        "address": "0:dc69be3a989b1513f14e9e4ecc46ff6753770a2b199138708ff66238c2719e99",
        "network": "-239",
        "publicKey": "321b717a3a455096b6c3d20ad3f66207125557dacbb888fca9e00023aa89bfff",
        "walletStateInit": "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"
      }
    ],
    "device": {
      "platform": "iphone",
      "appName": "Tonkeeper",
      "appVersion": "3.0.304",
      "maxProtocolVersion": 2,
      "features": [
        "SendTransaction",
        {
          "name": "SendTransaction",
          "maxMessages": 4
        }
      ]
    }
  }
}