Prior to UBU v1.80.a16, there was a processing issue whereby the Padding file under File GUID: B52282EE-9B66-44B9-B1CF-7E5040F787C1 was not retained. UBU now has the ability to maintain the Padding file by selecting A - Start replacement Alternative with MMTool when updating microcodes.
See this post.
This is an awesome thread/topic. Thanks to all who contributed!