Datetimepicker theme issue in datagrid

[patelrais]

I am using datetimepicker control datagrid control wpf, but it showing theme only for the first row, for second row it does not show theme, some time for the first row also it don't display theme. Here is the recorded video of the issue.

https://www.awesomescreenshot.com/video/21631984?key=7023652414baf1e30c6f43ca90e18c48

<UserControl xmlns:hc="https://handyorg.github.io/handycontrol"
             x:Class="TestProject.View.UserControls.DateTimeHandy"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:system="clr-namespace:System;assembly=mscorlib"
             xmlns:local="clr-namespace:TestProject.View.UserControls"
             mc:Ignorable="d">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <hc:ThemeResources />
                <hc:Theme />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </UserControl.Resources>
    <Grid>
        <hc:DateTimePicker x:Name="dtTime"
            Language="en" InputLanguageManager.InputLanguage="en" SelectedDateTime="{Binding ManufacturedTime}" />
    </Grid>
</UserControl>

And this is my datagrid column:

    <DataGridTemplateColumn Header="Manufactured Date and Time">
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <usercontrols:DateTimeHandy VerticalAlignment="Center" HorizontalAlignment="Center" Language="en" />
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>