Submitting modal from a 'peeked' forum thread fails

[JakePost]

Description

Using a command interaction to open a modal from within a forum thread while it is not opened in 'Full View' causes the submission to fail and the interactions endpoint to return a 400 error with the response {"message": "Cannot execute action on this channel type", "code": 50024}.

If instead the modal is submitted with the thread in Full View, it succeeds.

Steps to Reproduce

1. Create or open an existing thread inside of a forum channel that is not in Full View.
2. Run an interaction that opens a modal with text input fields.
3. Fill in the text fields and click submit.

Expected Behavior

Modal should submit without any errors and the 'bot' processing the interaction should receive a interactionCreate event.

Current Behavior

Modal does not submit and returns an 400 error on the client with the response {"message": "Cannot execute action on this channel type", "code": 50024}.

The processing bot for the interaction does not receive an event for the submission.

Screenshots/Videos

Client and System Information

Tested using discord running on Google Chrome and natively in Windows 11 and macOS.