Is replit tag broken?

I just added Gwion to replit. Well, I had already done so, but now I leverage github releases, so it loads way faster.
I wanted to shared it on dev, as I have some remaining question, but it looks that the liquid tag for embedding replit is broken: on my machine, I can't see what I type ...
Is it just me or did I uncover some issue?

For sure one can check it here.

There's the mandatory hello world, that you can run

./gwion hello_world.gw

Maybe it is only broken in the preview, in which case I'll delete this post.