I have a Repeater field (same issue with a Group field) set to display as Row. In the repeater or group I have a Clone field set to seamlessly clone all fields in a field group. The group contains a Flexible Content field with no label. (I have a feeling it doesn’t matter what type of field this is as long as it doesn’t have a label.) In this case the cloned field will show up in the left column of the repeater or group.
I’m just wondering, since the Label is an optional field, and in this case omitting the label breaks the layout, why wouldn’t this be considered a bug? Shouldn’t ACF check if the label is empty and account for it?