ItemId doesn't get passed to Redemption

[robbie-thompson]

According to the help flags you can specify a custom item ID for the add-redemption event:

$ twitch event trigger add-redemption -h
...
-i, --item-id string           Manually set the ID of the event payload item (for example the reward ID in redemption events).

You can then do this like so: twitch event trigger add-redemption -i random-id-here

However, the generated body doesn't include this ID, and instead uses a randomly generated one:

{
   ...
   "event":{
      ...
      "reward":{
         "id":"65f6f018-006b-be0b-fa1e-01ae9c7f177a"
         ...
      }
   }
}

I've had a quick look through the command definition and how it gets passed through to the RedemptionParams structure, but nothing obvious is jumping out at me.