Hi Jonathan, 

I see same behavior as you discovered when I use Border = 3D Lowered and column height doesn't match multiple of text line height exactly. I see it as soon as I do Preview in the DataWindow Painter so issue has nothing to do with code in your app. My setup:

• Windows 10.0.19041.21
• PB 2019 R2 #2279

See attachment for screen shot.

BTW: No problems in MultiLineEdit control itself. This is rendering inside DW screen area.

Hi Johanthan;

   This is my test from PB2017R3, PB2019 and PB2019 R2 Beta builds of PowerBuilder as per your support ticket information. As you can see from my test PB App, it has no pixelation issues when scrolling before or after the GetFocus causes the vertical scroll bar to appear / disappear or when scrolling to the end.

Regards ... Chris

More info (which I will add to the ticket I opened as well):

The issue occurs if the displayed text in the field has a partial line of text showing at the bottom of the field before you click into the field to activate the scrollbar.  When you click in the field to activate the scrollbar, that partial line of text becomes the garbage line you see as you scroll down through the text in the field:

Before clicking in the window:

After clicking in the window, when the scrollbar appears (scroll right to see the scrollbar):

After further scrolling to the bottom of the data:

Hi Jonathan;

  What PB version is this issue from?

Regards ... Chris

Report that as a bug. It shouldn't happen.