If you load up the new snapshot, everything disappears.

The hotbar is gone as well as the inventory

This is supposed to be a furnace

Somehow, the chest gui still shows, but it's empty

Even the pause menu and the main menu are gone

I'm not using neither the modded lenguages nor other textures/mods that could conflict

I'm aware of the issue.

The snapshot is going Through a lot of changes, one of them happens to be a gui refactor, I won't touch it until there's more progress on that front and I can safely assume my work won't go down the drain next week.

Ah, ok, thanks for the info.
I guess we'll just have to wait.