Webhook Followup / Unknown Webhook (404)

[AlexFlipnote]

Description

Whenever I respond to an interaction URL request with a defer, it goes through as normal, and Discord says that the "Application is thinking". However at random occurrence, whenever I wish to reply with /webhooks/:app_id/:followup_token, it would tell me that the webhook is not there (404). After making my script retry for 2-3 times in a span of ~10 seconds, it finally registers that it can reply and gets a HTTP 200 request.

Steps to Reproduce

• Use Interaction URL and not traditional websocket
• Reply to Discord's webhook request with following JSON

{
  "type": 5,
  "data": { "flags": 0 }
}

• Attempt to send a followup to /webhooks/:app_id/:followup_token with something as simple as {"content": "Hello world"}
• Wait to see if that one moment you attempt, has the random occurance of not allowing you to reply (While testing before submitting this issue, I get it every 10'ish minutes)

Expected Behavior

Being able to reply to a defer instantly as shown here

Current Behavior

Random chance to return HTTP 404 until a few seconds has passed and Discord API finally lets you reply to the followup token.

Screenshots/Videos

They are provided above

Client and System Information

Library: discord.http (Python, Quart, aiohttp)
OS: Windows 11 Pro

[jhgg]

When replying to an HTTP response, there is no guarantee that Discord has received the response that you sent before it received your request for a follow up.

Discord probably needs to handle a follow up for an interaction where a result has not yet been replied to as resolving the interaction, and then dropping the http response asking it to be deferred when it receives the response.

[AlexFlipnote]

When replying to an HTTP response, there is no guarantee that Discord has received the response that you sent before it received your request for a follow up.

Even if the client is saying that "Application is thinking", intentionally waiting 2 seconds before sending a followup, yet still getting a HTTP 404? Just asking since it feels a bit strange where the client shows that the API has accepted my defer response, yet followup token is unavailable at some random points, for a duration of 2-10 seconds (it's a bit random at times), which is after I can see that a defer has been handled by Discord.

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