How to disable ```auto expanding(and select langange) in the forum post?

I don’t remember when crystal forum update to support this, I really hate it.

What I expected is , I type the beginning/ending of code use ``` myself, can I disable this to rollback to old forum behavior?

Thanks

See New Discourse auto-formatting: Anyone else find this annoying? - #2 by jryans - General - Racket Discourse

The discourse instance is managed by them. We don’t manage the updates.

I always use the markdown mode. Works really well.

Unfortunately, I don’t think we can do anything about this.
We could change the default editing mode to Markdown. I would probably expect that?
But every user can change their own default already.