Weird black line at top of the program

[NotroDev]

Describe the bug

Window in minimized view has a weird black line at the top.

Steps to reproduce the bug

Just create window. I used this code:

<hc:Window x:Class="SkEditorPlus.SettingsWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
           xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
           xmlns:hc="https://handyorg.github.io/handycontrol"
           mc:Ignorable="d"
           Title="Ustawienia"
           WindowStartupLocation="CenterScreen"
           ShowTitle="True"
           Height="450" 
           Width="800" Loaded="OnWindowLoad" ResizeMode="NoResize">
</hc:Window>

Expected behavior

No response

Screenshots

NuGet package version

HandyControls (Custom version) 3.3.11

IDE

Visual Studio 2022

Framework type

.Net 5.0

Windows version

Windows 11 (22000)

Additional context

No response