KivyMD: MDRaisedButton - Elevation

Description of the Bug

MDRaisedButton still showing an elevation (when the button is clicked), even I set the elevation to 0.

Code and Logs

from kivy.lang import Builder
from kivymd.app import MDApp

KV = '''
<RaisedBtn@MDRaisedButton>
    elevation: 0
    shadow_offset: (0,0)
    shadow_radius: 0
    shadow_softness: 0
    ripple_scale: .1
    
MDScreen:
    MDBoxLayout:
        md_bg_color: 1, 1, 0, 1
        size_hint: 0.9, 0.7
        orientation: "vertical"
        pos_hint: {'center_x':.5, 'y':0.1}

        ScreenManager:
            MiniScreen:
                name: "one"

            MiniScreen2:
                name: "two"

<MiniScreen@MDScreen>:
    MDBoxLayout:
        orientation: "vertical"
        MDWidget:
        MDBoxLayout:
            orientation: "vertical"
            spacing: dp(10)
            adaptive_height: True

            RaisedBtn:
                size_hint_x: 1
                text: "Login"
                on_press: 
                    root.parent.current = 'two'
        MDWidget:   
        
<MiniScreen2@MDScreen>:
    MDBoxLayout:
        orientation: "vertical"
        MDWidget:
        MDBoxLayout:
            orientation: "vertical"
            spacing: dp(10)
            adaptive_height: True

            RaisedBtn:
                size_hint_x: 1
                text: "Register"
                # on_press: print(f"{self.text}")
                on_press: root.parent.current = 'one'
        MDWidget:   
'''


class Test(MDApp):
    def build(self):
        return Builder.load_string(KV)


Test().run()

Video

https://user-images.githubusercontent.com/48113758/187356140-a6b67545-3810-4cab-8378-cb513a6efeb4.mov

Versions

• OS: Windows
• Python: v3.7.6
• Kivy: v2.1.0
• KivyMD: 1.1.0.dev0, git-Unknown, 2022-08-28