False Tab content in tab bar

[RobertFlatt]

Description of the Bug

Tab contents can be rendered in the tab bar, these are false images of widgets, not active widgets.

Scroll down to Button 9. Move cursor fast up to Button 6. Issue: look at false button image(s) above in Tab bar

Code and Logs

from kivy.lang import Builder
from kivy.uix.scrollview import ScrollView

from kivymd.app import MDApp
from kivymd.uix.label import MDLabel
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.button import MDButton, MDButtonText
from kivymd.uix.tab import (
    MDTabsItemIcon,
    MDTabsItemText,
    MDTabsItem,
)

KV = '''
MDScreen:
    md_bg_color: self.theme_cls.backgroundColor
    MDBoxLayout:
        orientation:'vertical'
        MDTabsPrimary:
            id: tabs
            pos_hint: {"center_x": .5, "center_y": .5}
            MDDivider:
            MDTabsCarousel:
                id: related_content_container
                size_hint_y: None
                height: dp(320)
        MDLabel:
            text:'Scroll down to Button 9. Move cursor fast up to Button 6. \\nIssue: look at false button image(s) above in Tab bar.'
            halign:'center'
'''

class Example(MDApp):
    def on_start(self):
        super().on_start()
        self.root.ids.tabs.add_widget(
            MDTabsItem(MDTabsItemText(text='A Tab')))
        
        bl = MDBoxLayout(orientation='vertical',
                         size_hint_y=None)
        bl.bind(minimum_height=bl.setter('height'))
        for i in range(10):
            bl.add_widget(MDButton(MDButtonText(text='Button '+str(i)),
                                   pos_hint={"center_x": .5, "center_y": .5}))

        sv = ScrollView()
        sv.add_widget(bl)
        self.root.ids.related_content_container.add_widget(sv)

    def build(self):
        self.theme_cls.primary_palette = "Olive"
        return Builder.load_string(KV)


Example().run()

Screenshots

False images disappear on certain refresh events, hence photo not screenshot. The line below Button 1 is the MDDivider between tabs contents and header.

Versions

• OS: Windows 11
• Python: 3.11.1
• Kivy: 2.3.0
• KivyMD: 2.0.1.dev0

[HeaTTheatR]

https://github.com/kivymd/KivyMD/issues/1635