Based on feedback from users, we've just released a new feature for our cloneable fields. Previously, there were always visible inputs for you to enter data for cloneable fields. And when you want more instances, you need to click the “+ Add New” button.
From now on, you can decide to hide all inputs at first, and when you need to enter data, you’ll need to click the “+ Add New” button. This means that there may be no items, instead of at least one as before. This update is also a step forward in the UX/UI of Meta Box.