I get a silent failure when I leave the 'description' as blank to CreateGlobalApplicationCommand, maybe this is not allowed by the API, but I think there would be an error response / exception at least if so. As opposed to just silently terminating.

Basically:

  let f d = basicCallFetch $ CreateGlobalApplicationCommand appId $ (CreateApplicationCommandChatInput "configure123" d (Just $ ApplicationCommandOptionsValues v) True)

  -- this fails silently? 
  f ""
  -- f "this does not"

f "" will terminate silently
f "exampleString" will not

A completely minimal example project describing this is here: https://github.com/chrissound/713 (you'll need to set your API token and application id).

I determined it's silently failing because in the first case (in that repo) it ouputs:

Hello, Haskell!
"1"
Ended
"Done"

While in the second case:

Hello, Haskell!
"1"
"2"