When pressing "/" it actually puts in "/" in the typing menu as well

[CaelmDev (Caelm)]

The title speaks for me. In Roblox, when I press the / key to type, it types the / in the chat as well which is super annoying

[VGVC2]

Yep, can confirm this, as of version 571.

[Midnightific]

Yeah, this was already reported in a bug report:

New TextChatService "/" to send message sends slash in message

Using the “/” hotkey to send a message in roblox’s new TextChatService causes the / to send in the beginning of the message. This occurs across multiple experiences, and can be reproduced by creating a new baseplate file and using the new TextChatService. This occurs both in roblox studio and in-experience. Example from in-experience: Other Experiences: Expected behavior When using the “/” hotkey to send a chat message, the slash should not send as part of the message.