[BUG] Reacting to the emoji of confirm_thread_creation_deny opens a thread.

[XtoManuel]

Describe the bug
If a user reacts to the emoji of confirm_thread_creation_deny a thread is opened.

Bot Info
Bot version (check with @modmail about): 3.7.13
Host method (Heroku, self-host, etc): Self-hosting in a VPS

To Reproduce
Steps to reproduce the behavior:

1. Who can reproduce (ex. anyone, owners)? @everyone
2. Where can it be reproduced (ex. in thread channels, recipient DM's)? In the MD
3. Done what to cause the error? Write a message in the MD, get the confirmation message and react to the emoji of confirm_thread_creation_deny
4. Any recently made changes to your bot? No
5. Errored

Error Logs
If your Modmail bot is online, type @modmail debug hastebin and include the link here.
https://hasteb.in/forofusa

[200percentmicky]

Adding on to this issue. On my side, confirm_thread_creation_deny works with the default ❌, but opens a thread anyway with a custom emoji.