<ui:window> and <ui:progressbar> related problems

Describe the bug
A.
When the app is launched in the maximized state, it takes up the entire screen, not just the workarea.
When restore the window after start in the maximized state, its height and width are not the specified values.

B.
When the inside of the progress bar is filled with color, the ends are flat, not circular.

To Reproduce
Steps to reproduce the behavior:
A.
1. Create an app with:

<ui:window
Height="{Binding Source={x:Static local:Settings.Default}, Path=WindowHeight, Mode=TwoWay}" 
Width="{Binding Source={x:Static local:Settings.Default}, Path=WindowWidth, Mode=TwoWay}" 
Left="{Binding Source={x:Static local:Settings.Default}, Path=WindowLeft, Mode=TwoWay}"
Top="{Binding Source={x:Static local:Settings.Default}, Path=WindowTop, Mode=TwoWay}"
WindowState="{Binding Source={x:Static local:Settings.Default}, Path=WindowState, Mode=TwoWay}"
 ...........
 >

  2. Maximize the app and restart it.

B. Create an app with progress bar and open it.

Expected behavior
A. Behave as Edge dose.

B. When the inside of the progress bar is filled with color, the ends are circular.

Screenshots
B. The left end is flat(the right end as well):

Desktop (please complete the following information):

• .NET: [net 6.0 - windows 11]
• Version: [2.0.2]