Macro should run without switching sheets

I have a macro that calls other macros that go to other tabs, look at the data, then hide some rows. I've tried putting the Application.ScreenUpdating = False command at various places in both the main macro and the macros that are called by the main macro, but no matter what I've tried, when the macro runs, the screen flicks over to those other tabs. Any thoughts? The macros are below. The UPDATEALLSHEETS macro is the first one, which calls the other ones.

Sub UpdateAllSheets()

Application.ScreenUpdating = False

    Call VolumeRowUnhideHide
    Call UpdateSpendingAllMfg
    
Application.ScreenUpdating = True
        
Sheets("Key Metrics").Select   'This puts the user back to the place they started.
Range("G4").Select
    
End Sub


Sub VolumeRowUnhideHide()

Application.ScreenUpdating = False
      
Dim Rwn As Long
Sheets("Volume").Select
        Range("b6:b28").Select
        Range("b6:b28").EntireRow.Hidden = False
     
        For Rwn = 6 To 28
            If Cells(Rwn, 3) = 0 And Cells(Rwn, 4) = 0 And Cells(Rwn, 5) = 0 Then
                Cells(Rwn, 3).EntireRow.Hidden = True
            End If
        Next Rwn
    
    Range("B1").Select
      
    Application.ScreenUpdating = True

End Sub


Sub UpdateSpendingAllMfg()
    
Application.ScreenUpdating = False
     
Dim Rwn As Long
       
Sheets("Spending - All Mfg").Select
        Range("C9:C22").Select
        Range("C9:C22").EntireRow.Hidden = False

        For Rwn = 9 To 22
            If Cells(Rwn, 3) = 0 And Cells(Rwn, 4) = 0 And Cells(Rwn, 5) = 0 Then
                Cells(Rwn, 3).EntireRow.Hidden = True
            End If
        Next Rwn
    
    Range("B1").Select
      
    Application.ScreenUpdating = True
      
End Sub