child events fired on parent widget interaction

main.kv

<PropertyTag>:
    size_hint: (None, None)
    size: tag_label.size
    Label:
        size: self.texture_size
        on_touch_down: print(self.on_touch_down)
        on_touch_up: print(self.on_touch_up)
        id: tag_label
        color: 0, 0, 0, 1
        canvas.before:
            Color:
                rgba: root.background_color
            Rectangle:
                pos: self.pos
                size: self.size
        font_size: 24
        text: root.tag_text
        
<NewOutline>:
    name: 'New Outline'
    FloatLayout:
        PropertyTag:
        PropertyTag:
        PropertyTag:
        PropertyTag:
        PropertyTag:
        PropertyTag:
        PropertyTag:

main.py

class PropertyTag(Scatter):
    red = .6, .2, .2, 1
    green = .2, .6, .2, 1
    gray = .5, .5, .5, .8
    background_color = ListProperty(gray)
    pressed_pos = ObjectProperty()
    tag_text = StringProperty('unselected')
    current_state = 'unselected'