Progress Bar On Userform Not Updating

I am using a version of the Progress bar code shown below which I found on a thread here.

Private Sub UserForm_Activate()
Dim dTime As Date
Dim i, t As Integer
For i = 1 To 100 Step 100 / 8
dTime = Now + TimeValue("0:00:01")
Application.Wait TimeValue(dTime)
ProgressBar1.Value = i
Next i
End Sub

I have the code written so the progress bar shows the progress by taking the total number of loops that need to happen divided by the number of times the loop has taken place. During each loop, the macro copies and pastes data and formats it, then loops again after updating the progress bar. The progress bar works great and shows the progress of the macro if I step through the macro. But if I run the macro at around 25% or 30% the Userform with the progress bar stops updating the bar and the progress seems like its stuck at that percent. The macro still runs fine and finishes without any errors. The macro does not turn off the screen updating. I just can't figure it out.