Observers are updated when cloned

When cloning an observer, the newly made observer is updated and fires. I assume this must be a bug as observers used to update when first placed by hand, but now they do not. As far as I can tell, this only works if there is a block in the observer's "observation space" when cloned, so this may have to do with update order.

Until fixed, it is very difficult to duplicate or share observer-based contraptions. Thanks!