Quark's feature where you can open both doors at once is bugged with the tooth doors. If you try to open them and wait a few seconds, one of the doors will shut again by itself.

This is more of an issue on Quark's side, as it's not something we can fix on our side without sacrificing existing parts of the Tooth Doors mechanics, and it shows a small flaw in the Quark double door opening system.

The unique function of Tooth Doors is that they auto-shut when opened by a player.
Quark's double door opening wasn't made in a way to handle these sorts of mechanics, as it opens the doors using a custom method.

Ideally, Quark should change its code to use a door block's onBlockActivated() method because that's how doors get opened by players.
I recommend opening an issue on Quark's repository.

quark has fixed this on their end, so this issue could be closed i think