Pre-selected modifiers in a set, if accidentally removed, are not re-selectable

[capsicum]

Using Square for Restaurants Free.

We have multiple modifiers for each menu item. I finally figured out how to get them to show up in the order I want (by not requiring any of them, which is totally counter intuitive, but whatever, it kinda works). But, if I have a modifier with our "includes" (such as cheese, lettuce, onion, olive, etc.) and have the most common ones pre-selected, if I accidentally hit one of them on the list on the right side of the screen (say, if I want to remove the lettuce, but hit cheese by mistake) it will not let me re-add the cheese to the item. This is so bizarre.