Excel 365 ActiveX Textbox for "Search as you type" not working on second monitor

It isn't clear to me what you see in the two different windows when using laptop with an external monitor. Is it two different worksheets? Two views of the same worksheet?

I tested by creating a second window to display Sheet1. I sized the windows so one of them displayed just TextBox 1, while the other showed just the Table. When the textbox was in Window 2, I couldn't select it. When the textbox was in WIndow 1, the code shown below worked as desired.

Private Sub TextBox1_KeyUp(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
Dim xStr As String, xName As String
Dim xRg As Range

Application.ScreenUpdating = False
With TextBox1
    xName = "Materials"
    xStr = .Text
    Set xRg = .Parent.ListObjects(xName).Range
    If xStr <> "" Then
        xRg.AutoFilter Field:=2, Criteria1:="*" & xStr & "*", Operator:=xlFilterValues
    Else
        xRg.AutoFilter Field:=2, Operator:=xlFilterValues
    End If
End With

End Sub