Cheat Commands can be Used in the Terminal Despite World Settings

I moved a world to a BDS server which has achievements on and cheats off. Despite that, the terminal can be used to execute all commands but players still do not have access to cheat commands on their client.

Steps to Reproduce

1. Open a server with a world that has cheats off and have a client join
2. Type any cheat command such as /gamemode
3. Have the client connected do something to earn an achievement

Observed Result

The cheat command gets ran anyway and achievements can still be earned and cheats are still off.

Expected Result

The terminal should say cheat commands are disabled and not run the cheat command used.